Filed Pursuant to Rule 424(b)(3)
                                               Registration File No.: 333-99693




PROSPECTUS


                       L-3 COMMUNICATIONS HOLDINGS, INC.


                         448,582 SHARES OF COMMON STOCK


                             ---------------------

     All of the common stock offered hereby may be sold from time to time by
and for the account of the selling stockholders named in this prospectus.


     The methods of sale of the common stock offered hereby are described
under the heading "Plan of Distribution." We will receive none of the proceeds
from such sales.


     The selling stockholders and any broker-dealers that participate in the
distribution of the common stock offered hereby may be deemed to be
"underwriters" within the meaning of the Securities Act of 1933. As a result,
any commission or profit on the resale of shares received by such
broker-dealers may be deemed to be underwriting commissions and discounts
under the Securities Act. Upon being notified by the selling stockholders that
any material arrangement has been entered into with a broker or dealer for the
sale of the shares through a secondary distribution, or a purchase by a broker
or dealer, a supplemented prospectus will be filed, if required, disclosing
among other things the names of such brokers and dealers, the number of shares
involved, the price at which such shares are being sold and the commissions
paid or the discounts or concessions allowed to such broker-dealers.


     The common stock of the Company is listed on the New York Stock Exchange
(Symbol: LLL). On October 30, 2002, the closing price of the shares was $45.80
per share.


     Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or determined if
this prospectus is truthful or complete. Any representation to the contrary is
a criminal offense.



                             ---------------------






                The date of this Prospectus is October 31, 2002.



                                TABLE OF CONTENTS






                                                      PAGE                                                                PAGE
                                                   ---------                                                           ---------
                                                                                                              
The Company ....................................        1           Available Information ..........................       13
Use of Proceeds ................................        1           Incorporation of Certain Documents by
Selling Stockholders ...........................        1              Reference ...................................       13
Unaudited Pro Forma Condensed                                       Legal Matters ..................................       14
   Consolidated Financial Information ..........        2           Experts ........................................       14
Plan of Distribution ...........................       12






                                        i


                                   THE COMPANY

     We are a leading merchant supplier of secure communications and
intelligence, surveillance and reconnaissance (ISR) systems, training,
simulation and support services, aviation products and aircraft modernization,
as well as specialized products. Our businesses employ proprietary
technologies and capabilities, and we believe our businesses have leading
positions in their respective primary markets. Our customers include the U.S.
Department of Defense and prime contractors thereof, certain U.S. Government
intelligence agencies, major aerospace and defense contractors, foreign
governments, commercial customers and certain other U.S. federal, state and
local government agencies.

                               ----------------

     Our principal executive offices are located at 600 Third Avenue, New
York, New York 10016, and our telephone number is (212) 697-1111.


                                 USE OF PROCEEDS

     We will not receive any of the proceeds from the sale of the shares
offered by the selling stockholders.


                              SELLING STOCKHOLDERS

     The selling stockholders listed below received shares as partial
consideration in connection with our acquisition of ComCept, Inc. ("ComCept").
The selling shareholders may receive additional consideration in cash or
common stock, which is contingent on the performance of ComCept for each of
its fiscal years ending June 30, 2003 and June 30, 2004. The maximum
additional common stock which may be payable to the selling stockholders for
that additional contingent consideration is 219,088 shares, which would be
distributed to the selling stockholders on a pro rata basis.

     The following table states the number of shares of our outstanding common
stock that the selling stockholders own resulting from payments made in our
common stock in connection with our acquisition of ComCept, the number of such
shares that may be sold for the account of the selling stockholders, and the
number of shares that will be owned by the selling stockholders assuming the
sale of all the shares offered hereby.





                             NUMBER OF        NUMBER OF         NUMBER OF
                             SHARES OF        SHARES OF         SHARES OF
                           COMMON STOCK     COMMON STOCK       COMMON STOCK
SELLING STOCKHOLDER            OWNED         TO BE SOLD      OWNED AFTER SALE
-----------------------   --------------   --------------   -----------------
                                                   
Adelbert W. Carpenter           6,405            6,405               0
Anne L. Wester                  5,025            5,025               0
Ben K. Howell                   2,540            2,540               0
Brian D. Cullen                99,402           99,402               0
Christopher Christon            4,528            4,528               0
David L. Tschoerner             6,074            6,074               0
Dee Ann Watkins                 1,397            1,397               0
Dennis R. Baas                  7,731            7,731               0
Frederick L. Wahl               5,522            5,522               0
George M. Eargle               11,486           11,486               0
James C. Glenn, Jr.             1,325            1,325               0
Lex E. Thornton                 1,833            1,833               0
Mark R. Von Schwarz            13,253           13,253               0
Michael C. Greer               17,671           17,671               0
Neal B. Cooper                 12,480           12,480               0
Philip A. Yates                 3,092            3,092               0
Robert E. Dryden               20,984           20,984               0
Robert S. Dunn                    353              353               0
Robert L. Amick                 7,731            7,731               0
Robert R. Spaulding               662              662               0
                               ------           ------             ---
                              229,494          229,494               0
                              =======          =======             ===


                                        1


        UNAUDITED PRO FORMA CONDENSED CONSOLIDATED FINANCIAL INFORMATION

     The following unaudited pro forma condensed consolidated statements of
operations ("pro forma statement of operations") data gives effect to the
following transactions as if they had occurred on January 1, 2001: (1) our
acquisition of AIS, which was completed on March 8, 2002, our acquisition of
the detection systems business of PerkinElmer, which was completed on June 14,
2002 and the acquisitions of KDI Precision Products, Inc., EER Systems, Inc.,
Spar Aerospace Limited, Emergent Government Services Group, Bulova
Technologies, and SY Technology, Inc., which we completed during the year
ended December 31, 2001, and their related financings (collectively, the
"Acquisitions"), (2) the offering of $750.0 million 7 5/8% Senior Subordinated
Notes due 2012 by L-3 Communications and the concurrent sale by L-3
Communications Holdings, Inc. of 14,000,000 shares of its common stock, par
value $.01 per share (collectively, the "Offerings") and (3) the application
of the net proceeds of those offerings to repay $500.0 million of indebtedness
outstanding under our senior subordinated interim loan agreement incurred in
connection with our acquisition of AIS, repay the $445.6 million of
indebtedness outstanding under our senior credit facilities, to repurchase and
redeem our 10 3/8% Senior Subordinated Notes due 2007 for approximately $237.4
million and increase our cash and cash equivalents, which will be used for
general corporate purposes, including potential acquisitions. All of the
Acquisitions described above are included in our consolidated balance sheet as
of June 30, 2002, and therefore, an unaudited pro forma condensed consolidated
balance sheet is not provided.

     The pro forma statements of operations do not include an extraordinary
pre-tax charge of $16.2 million ($9.9 million after-tax) related to the
repurchase and redemption of our $225.0 million 10 3/8% Senior Subordinated
Notes due 2007. The extraordinary charge includes the call premium of 5.188%
or approximately $11.7 million and fees and other expenses of approximately
$4.5 million, including the write-off of unamortized deferred debt issue costs
relating to the $225.0 million 10 3/8% Senior Subordinated Notes due 2007. The
extraordinary charge is not included in the pro forma statements of operations
because it is not a component of income (loss) from continuing operations.
However, had the repurchase and redemption occurred on January 1, 2001, the
extraordinary charge would have reduced pro forma basic earnings per common
share by $0.11 and pro forma diluted earnings per common share by $0.10 for
the six months ended June 30, 2001 and for the year ended December 31, 2001.

     The pro forma adjustments related to our Acquisitions are based on
preliminary purchase prices and purchase price allocations. Actual adjustments
will be based on final purchase prices, audited historical net assets for the
Acquisitions, and final appraisals and other analyses of fair values of
contracts in process, inventories, estimated costs in excess of billings to
complete contracts in process, identifiable intangibles, pension and
postretirement benefit obligations and deferred tax assets and liabilities,
which will be completed after we obtain and review all of the data required
for the acquired assets and liabilities and complete our valuations of them.
Differences between the preliminary and final purchase price allocations could
have a material impact on our results of operations and financial position.
The unaudited pro forma condensed consolidated statement of operations does
not reflect any cost savings that we believe would have resulted had the
Acquisitions occurred on January 1, 2001.

     The unaudited pro forma condensed consolidated financial information
should be read in conjunction with (1) our unaudited condensed consolidated
financial statements for the six months ended June 30, 2002 and 2001, and our
audited consolidated financial statements for the year ended December 31, 2001
incorporated by reference in this prospectus; and (2) the audited combined
financial statements of AIS for the year ended December 31, 2001 incorporated
by reference in this prospectus. The other historical statement of operations
data for the Acquisitions are based on unaudited financial statement data not
included or incorporated by reference herein. The unaudited pro forma
condensed consolidated financial information may not be indicative of the
results of operations that actually would have occurred had the Acquisitions
and the Offerings been completed on January 1, 2001 or the results of our
operations that may be obtained in the future.


                                        2


      UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS
                    FOR THE SIX MONTHS ENDED JUNE 30, 2002
                                 (IN MILLIONS)






                                                                                                                    PRO FORMA
                                                                       PRO FORMA                                     FOR OUR
                                        L-3                           ADJUSTMENTS     PRO FORMA     ADJUSTMENTS    ACQUISITIONS
                                         AS          ACQUISITION        FOR OUR        FOR OUR        FOR THE        AND THE
                                      REPORTED    HISTORICAL(1)(2)   ACQUISITIONS   ACQUISITIONS     OFFERINGS      OFFERINGS
                                   ------------- ------------------ -------------- -------------- --------------- -------------
                                                                                                
Sales ............................  $ 1,652.0         $  276.6         $    --       $ 1,928.6       $    --       $ 1,928.6
Costs and expenses ...............    1,483.0            267.9              --         1,750.9            --         1,750.9
                                    ---------         --------         -------       ---------       -------       ---------
  Operating income ...............      169.0              8.7              --           177.7            --           177.7
Interest and other income
 (expense) .......................        0.8               --            (1.5)(3)        (0.7)           --            (0.7)
Interest expense .................       57.7               --             8.1 (4)        65.8          (6.8)(5)        59.0
Minority interest ................        2.7               --              --             2.7            --             2.7
                                    ---------         --------         -------       ----------      -------       ----------
  Income (loss) before income
   taxes and extraordinary
   item ..........................      109.4              8.7            (9.6)          108.5           6.8           115.3
Provision (benefit) for income
 taxes(6) ........................       38.6              6.0            (3.8)           40.8           2.7            43.5
                                    ---------         --------         -------       ----------      -------       ----------
  Income (loss) from
   continuing operations .........  $    70.8         $    2.7         $  (5.8)      $    67.7       $   4.1       $    71.8
                                    =========         ========         =======       ==========      =======       ==========
Earnings per share:(7)
 Basic ...........................  $     0.89                                       $     0.85                    $     0.77
                                    ==========                                       ==========                    ==========
 Diluted .........................  $     0.84                                       $     0.81                    $     0.74
                                    ==========                                       ==========                    ==========
Weighted average common
 shares outstanding:(7)
 Basic ...........................       79.4                                             79.4          14.0            93.4
                                    ==========                                       ==========      =======       ==========
 Diluted .........................       90.1                                             90.1          14.0           104.1
                                    ==========                                       ==========      =======       ==========


 See notes to Unaudited Pro Forma Condensed Consolidated Financial Statements

                                        3


      UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS
                    FOR THE SIX MONTHS ENDED JUNE 30, 2001
                                 (IN MILLIONS)






                                       L-3
                                         AS         ACQUISITIONS
                                      REPORTED    HISTORICAL(1)(8)
                                   ------------- ------------------
                                           
Sales ............................  $ 1,023.5         $  667.2
Costs and expenses ...............      916.1            649.3
                                    ---------         --------
  Operating income ...............      107.4             17.9
Interest and other income
 (expense) .......................        1.4             (5.9)
Interest expense .................       46.4              0.4
Minority interest ................        1.6               --
                                    ---------         --------
  Income (loss) before income
   taxes .........................       60.8             11.6
Provision (benefit) for income
 taxes(6) ........................       23.3              5.3
                                    ---------         --------
  Income (loss) from
   continuing operations .........       37.5              6.3
Goodwill amortization expense,
 net of tax ......................       15.8               --
                                    ---------         --------
  Income (loss) from
   continuing operations, as
   adjusted ......................  $    53.3         $    6.3
                                    =========         ========
Earnings per share:(7)
 Basic ...........................  $     0.52
                                    ==========
 Basic, as adjusted ..............  $     0.75
                                    ==========
 Diluted .........................  $     0.50
                                    ==========
 Diluted, as adjusted ............  $     0.71
                                    ==========
Weighted average common
 shares outstanding:(7)
 Basic ...........................       71.5
                                    ==========
 Diluted .........................       74.8
                                    ==========





                                                                                          PRO FORMA
                                        PRO FORMA                                          FOR OUR
                                       ADJUSTMENTS       PRO FORMA       ADJUSTMENTS     ACQUISITIONS
                                         FOR OUR          FOR OUR          FOR THE         AND THE
                                      ACQUISITIONS     ACQUISITIONS       OFFERINGS       OFFERINGS
                                   ------------------ -------------- ------------------ -------------
                                                                            
Sales ............................    $       --        $ 1,690.7       $      --        $ 1,690.7
Costs and expenses ...............         (14.8)(9)      1,550.6              --          1,550.6
                                      ----------        ---------       ---------        ---------
  Operating income ...............          14.8            140.1              --            140.1
Interest and other income
 (expense) .......................          (1.4)(3)         (5.9)             --             (5.9)
Interest expense .................          46.1 (4)         92.9           (20.0) (5)        72.9
Minority interest ................            --              1.6              --              1.6
                                      ----------        ----------      ---------        ----------
  Income (loss) before income
   taxes .........................         (32.7)            39.7            20.0             59.7
Provision (benefit) for income
 taxes(6) ........................         (13.9)            14.7             8.0             22.7
                                      ----------        ----------      ---------        ----------
  Income (loss) from
   continuing operations .........         (18.8)            25.0            12.0             37.0
Goodwill amortization expense,
 net of tax ......................            --             15.8              --             15.8
                                      ----------        ----------      ---------        ----------
  Income (loss) from
   continuing operations, as
   adjusted ......................    $    (18.8)       $    40.8       $    12.0(10)    $    52.8
                                      ==========        ==========      ============     ==========
Earnings per share:(7)
 Basic ...........................                      $     0.32                       $     0.40
                                                        ==========                       ==========
 Basic, as adjusted ..............                      $     0.53                       $     0.58
                                                        ==========                       ==========
 Diluted .........................                      $     0.31                       $     0.39
                                                        ==========                       ==========
 Diluted, as adjusted ............                      $     0.50                       $     0.56
                                                        ==========                       ==========
Weighted average common
 shares outstanding:(7)
 Basic ...........................           6.1 (11)        77.6            14.0             91.6
                                      ==============    ==========      ============     ==========
 Diluted .........................           6.1 (11)        80.9            14.0             94.9
                                      ==============    ==========      ============     ==========


  See notes to Unaudited Pro Forma Condensed Consolidated Financial Statements

                                        4


      UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS
                         YEAR ENDED DECEMBER 31, 2001
                                 (IN MILLIONS)






                                       L-3
                                         AS          ACQUISITIONS
                                      REPORTED    HISTORICAL(1)(12)
                                   ------------- -------------------
                                           
Sales ............................  $ 2,347.4        $  1,296.0
Costs and expenses ...............    2,072.1           1,235.5
                                    ---------        ----------
  Operating income ...............      275.3              60.5
Interest and other income
 (expense) .......................        1.8             (11.3)
Interest expense .................       86.3               0.5
Minority interest ................        4.5                --
                                    ---------        ----------
  Income (loss) before income
   taxes .........................      186.3              48.7
Provision (benefit) for income
 taxes(6) ........................       70.8              24.7
                                    ---------        ----------
  Income (loss) from
   continuing operations .........      115.5              24.0
Goodwill amortization expense,
 net of tax ......................       33.9                --
                                    ---------        ----------
  Income (loss) from
   continuing operations, as
   adjusted ......................  $   149.4        $     24.0
                                    =========        ==========
Earnings per share:(7)
 Basic ...........................  $     1.54
                                    ==========
 Basic, as adjusted ..............  $     1.99
                                    ==========
 Diluted .........................  $     1.47
                                    ==========
 Diluted, as adjusted ............  $     1.87
                                    ==========
Weighted average common
 shares outstanding:(7)
 Basic ...........................       74.9
                                    ==========
 Diluted .........................       85.4
                                    ==========






                                                                                          PRO FORMA
                                        PRO FORMA                                          FOR OUR
                                       ADJUSTMENTS       PRO FORMA       ADJUSTMENTS     ACQUISITIONS
                                         FOR OUR          FOR OUR          FOR THE         AND THE
                                      ACQUISITIONS     ACQUISITIONS       OFFERINGS       OFFERINGS
                                   ------------------ -------------- ------------------ -------------
                                                                               
Sales ............................    $       --        $ 3,643.4       $      --        $ 3,643.4
Costs and expenses ...............         (30.0)(9)      3,277.6              --          3,277.6
                                      ----------        ---------       ---------        ---------
  Operating income ...............          30.0            365.8              --            365.8
Interest and other income
 (expense) .......................          (3.8)(3)        (13.3)             --            (13.3)
Interest expense .................          82.0 (4)        168.8           (32.4) (5)       136.4
Minority interest ................            --              4.5              --              4.5
                                      ----------        ----------      ---------        ----------
  Income (loss) before income
   taxes .........................         (55.8)           179.2            32.4            211.6
Provision (benefit) for income
 taxes(6) ........................         (21.2)            74.3            13.0             87.3
                                      ----------        ----------      ---------        ----------
  Income (loss) from
   continuing operations .........         (34.6)           104.9            19.4            124.3
Goodwill amortization expense,
 net of tax ......................            --             33.9              --             33.9
                                      ----------        ----------      ---------        ----------
  Income (loss) from
   continuing operations, as
   adjusted ......................    $    (34.6)       $   138.8       $    19.4(10)    $   158.2
                                      ==========        ==========      ============     ==========
Earnings per share:(7)
 Basic ...........................                      $     1.35                       $     1.35
                                                        ==========                       ==========
 Basic, as adjusted ..............                      $     1.78                       $     1.72
                                                        ==========                       ==========
 Diluted .........................                      $     1.30                       $     1.32
                                                        ==========                       ==========
 Diluted, as adjusted ............                      $     1.69                       $     1.65
                                                        ==========                       ==========
Weighted average common
 shares outstanding:(7)
 Basic ...........................           3.1 (11)        78.0            14.0             92.0
                                      ==============    ==========      ============     ==========
 Diluted .........................           3.1 (11)        88.5            14.0            102.5
                                      ==============    ==========      ============     ==========


  See notes to Unaudited Pro Forma Condensed Consolidated Financial Statements

                                        5


                     NOTES TO UNAUDITED PRO FORMA CONDENSED
                        CONSOLIDATED FINANCIAL STATEMENTS

1.   On March 8, 2002, we acquired AIS for $1,152.7 million in cash which
     includes $1,130.0 million for the original contract purchase price, $4.0
     million for estimated acquisition costs and an increase to the contract
     purchase price of $18.7 million related to additional assets contributed
     by Raytheon to AIS. The purchase price is subject to adjustment based on
     the AIS closing date net tangible book value, as defined. The AIS
     acquisition was financed using cash on hand as well as available
     borrowings under our senior credit facilities and a $500.0 million senior
     subordinated interim loan. On June 14, 2002, we acquired the detection
     systems business of PerkinElmer ("PKI") for $100.0 million in cash plus
     acquisition costs, subject to adjustment based on closing date net
     working capital, as defined. During the year ended December 31, 2001, we
     also made the following acquisitions:

     o   in May 2001, all the outstanding common stock of KDI Precision
         Products, Inc. ("KDI") for $79.4 million in cash including
         acquisition costs.

     o   in May 2001, all the outstanding common stock of EER Systems, Inc.
         ("EER") for $119.5 million in cash including acquisition costs, and
         subject to an additional purchase price not to exceed $5.0 million
         which is contingent upon the financial performance of EER for the
         year ending December 31, 2002.

     o   in November and December 2001, 70.3% of the outstanding common stock
         of Spar Aerospace Limited ("Spar") for $105.1 million in cash
         including acquisition costs. We acquired and paid for the remaining
         outstanding common stock of Spar in January 2002 for $43.6 million.

     o   in November 2001, all the outstanding common stock of Emergent
         Government Services Group ("EMG") for $39.8 million, subject to
         adjustment based on closing date net working capital. Following the
         acquisition, we changed Emergent Government Services Group's name to
         L-3 Communications Analytics.

     o   in December 2001, the net assets of Bulova Technologies for $49.5
         million, subject to adjustment based on closing date net assets.
         Following the acquisition, we changed Bulova Technologies name to BT
         Fuze Products ("BT Fuze").

     o   in December 2001, the net assets of SY Technology Inc. ("SY") for
         $49.8 million, subject to adjustment based on closing date net
         assets, and additional purchase price not to exceed $3.0 million,
         which is contingent upon the financial performance of SY for the
         years ending December 31, 2002 and 2003.

     The aggregate purchase price of these acquisitions, including acquisition
costs, is $1,739.4 million.

2.   The pro forma statement of operations for the six months ended June 30,
     2002 includes the following unaudited historical financial data for our
     Acquisitions.






                                                   AIS(a)       PKI(b)      ACQUISITIONS
                                                -----------   ----------   -------------
                                                             (IN MILLIONS)
                                                                  
Sales .......................................    $  213.4      $  63.2       $  276.6
Costs and expenses ..........................       209.1         58.8          267.9
                                                 --------      -------       --------
 Operating income ...........................         4.3          4.4            8.7
Interest and other income ...................          --           --             --
Interest expense ............................          --           --             --
                                                 --------      -------       --------
 Income before income taxes and extraordinary
   item .....................................         4.3          4.4            8.7
Income tax provision ........................         2.4          3.6            6.0
                                                 --------      -------       --------
 Income from continuing operations ..........    $    1.9      $   0.8       $    2.7
                                                 ========      =======       ========


----------
(a)  Represents historical results of operations for the two-month period
     ended February 28, 2002.

(b)  Represents historical results of operations for the period from January
     1, 2002 to June 14, 2002.


                                        6


                    NOTES TO UNAUDITED PRO FORMA CONDENSED
               CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

3.   Our historical interest income has been eliminated because the cash and
     cash equivalents which earned the interest income were obtained from the
     net proceeds from the CODES (as defined below) offering and the May 2001
     Common Stock Offering (as defined below) that were assumed entirely to be
     used to finance the Acqusitions. Such eliminations amounted to $1.5
     million for the six months ended June 30, 2002, $1.4 million for the six
     months ended June 30, 2001 and $3.8 million for the year ended December
     31, 2001.

4.   The aggregate purchase prices, including acquisition costs, for the
     Acquisitions of $1,739.4 million were assumed to be financed at January
     1, 2001 using (1) borrowings under our senior credit facilities of $445.6
     million, (2) borrowings of $500.0 million under the senior subordinated
     interim loan, (3) cash on hand of $32.7 million, (4) the net proceeds
     from the sale of $420.0 million of 4% Senior Subordinated Convertible
     Contingent Debt Securities due September 15, 2011 ("CODES") in October
     and November of 2001, which amounted to $407.5 million, and (5) the net
     proceeds from our public offering of 9,150,000 shares of our common stock
     in May 2001 (the "May 2001 Common Stock Offering") which amounted to
     $353.6 million. The borrowings under the senior credit facilities and the
     senior subordinated interim loan that we made to finance the AIS
     acquisition were included in our historical results of operations
     effective March 1, 2002.

     The adjustments to our historical interest expense for the six months
     ended June 30, 2002 and 2001 and the year ended December 31, 2001 to give
     effect to the financing of the Acquisitions are presented below.




                                                               SIX MONTHS ENDED
                                                                   JUNE 30,         YEAR ENDED
                                                             --------------------  DECEMBER 31,
                                                                2002      2001         2001
                                                             --------- ---------- -------------
                                                                       (IN MILLIONS)
                                                                         
     Interest on borrowings under the senior credit
      facilities (on $445.6 million) for the periods prior
      to March 1, 2002(a) ..................................  $  3.6    $  15.8      $  29.3
     Interest on senior subordinated interim loan (on
      $500.0 million) for the periods prior to March 1,
      2002(a) ..............................................     4.5       21.6         38.0
     Interest on the CODES offering for the periods
      prior to October 31, 2001 (4% on $420.0 million
      for 10 months). ......................................      --        8.4         14.0
     Amortization of deferred debt issue costs incurred
      on the CODES for periods prior to October 31,
      2001 .................................................      --        0.7          1.2
     Eliminate historical interest expense for the KDI
      and SY Technology acquisitions .......................      --       (0.4)        (0.5)
                                                              ------    -------      -------
        Total pro forma adjustments to interest
         expense ...........................................  $  8.1    $  46.1      $  82.0
                                                              ======    =======      =======


----------
(a)  The adjustments to pro forma interest for the pro forma adjustments for
     borrowings under the senior credit facilities and senior subordinated
     interim loan are based on the average prevailing interest rates that L-3
     would have paid on those borrowings for the periods presented had such
     borrowings been outstanding at the beginning of each of the periods
     presented. The average prevailing interest rates on the senior credit
     facilities would have been 4.86% for the six months ended June 30, 2002,
     7.11% for the six months ended June 30, 2001 and 6.57% for the year ended
     December 31, 2001. The average prevailing interest rates on the senior
     subordinated interim loan would have been 5.36% for the six months ended
     June 30, 2002, 8.65% for the six months ended June 30, 2001, and 7.59%
     for the year ended December 31, 2001.


                                        7


                    NOTES TO UNAUDITED PRO FORMA CONDENSED
               CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

5.   Assuming the offering of the senior subordinated notes by L-3
     Communications and the concurrent sale of common stock of 14,000,000
     million shares were completed on January 1, 2001, the net aggregate
     proceeds from the Offerings of $1,499.4 million, after deductions for
     underwriting commissions and discounts and other offering expenses
     totaling $43.0 million, would have been applied to repay all of the
     borrowings under the senior subordinated interim loan of $500.0 million,
     repurchase and redeem our 10 3/8% Senior Subordinated Notes due 2007,
     repay $445.6 million of borrowings outstanding under the senior credit
     facilities and $316.4 million would have been invested in cash and cash
     equivalents. Total interest expense after the pro forma adjustments for
     our Acquisitions but prior to the Offerings amounted to $65.8 million for
     the six months ended June 30, 2002, $92.9 million for the six months
     ended June 30, 2001, and $168.8 million for the year ended December 31,
     2001. As a result of the Offerings, total pro forma interest expense
     would have decreased by $6.8 million for the six months ended June 30,
     2002, $20.0 million for the six months ended June 30, 2001 and $32.4
     million for the year ended December 31, 2001. The details of the changes
     to interest expense are described in the table below.






                                                      SIX MONTHS ENDED JUNE 30,
                                                     ---------------------------       YEAR ENDED
                                                        2002           2001         DECEMBER 31, 2001
                                                     ----------   --------------   ------------------
                                                                   (IN MILLIONS)
                                                                          
    Estimated interest on $750.0 million 75/8%
      Senior Subordinated Notes offered by
      L-3 Communications .........................    $  28.6        $  28.6            $  57.2
    Amortization of deferred debt issue costs
      incurred on $750.0 million Senior
      Subordinated Notes offered by
      L-3 Communications .........................        0.9            0.9                1.8
    Eliminate interest on the senior
      subordinated interim loan(a) ...............      (13.4)         (21.6)             (38.0)
    Eliminate interest on $225.0 million 10 3/8%
      Senior Subordinated Notes due 2007 .........      (11.7)         (11.7)             (23.3)
    Eliminate amortization of deferred debt
      issue costs incurred on $225.0 million
      10 3/8% Senior Subordinated Notes due
      2007 .......................................       (0.4)          (0.4)              (0.8)
    Eliminate interest on borrowings under the
      senior credit facilities (on $445.6
      million)(a) ................................      (10.8)         (15.8)             (29.3)
                                                      -------        -------            -------
      Total adjustments to pro forma interest
       expense ...................................    $  (6.8)       $ (20.0)           $ (32.4)
                                                      =======        =======            =======


----------
(a)  The adjustments to pro forma interest expense for the pro forma
     adjustments for borrowings under the senior credit facilities and senior
     subordinated interim loan are based on the average prevailing interest
     rates that L-3 would have paid on those borrowings for the periods
     presented had such borrowings been outstanding at the beginning of each
     of the periods presented. The average prevailing interest rates on the
     senior credit facilities would have been 4.86% for the six months ended
     June 30, 2002, 7.11% for the six months ended June 30, 2001 and 6.57% for
     the year ended December 31, 2001. The average prevailing interest rates
     on the senior subordinated interim loan would have been 5.36% for the six
     months ended June 30, 2002, 8.65% for the six months ended June 30, 2001,
     and 7.59% for the year ended December 31, 2001.

     The pro forma statements of operations do not reflect interest income on
     the $316.4 million pro forma cash balance at January 1, 2001 that we
     would have had after the Offerings.

6.   The pro forma adjustments for our Acquisitions and the Offerings were all
     tax-effected, as appropriate, using an estimated statutory (federal and
     state) tax rate of 40.0%. The pro forma


                                        8


                    NOTES TO UNAUDITED PRO FORMA CONDENSED
               CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     adjustments also include an income tax (benefit) provision (($0.8)
     million for the six months ended June 30, 2001 and $1.1 million for the
     year ended December 31, 2001) to record the aggregate income tax expense
     for the historical results of operations of KDI, EER, BT Fuze and SY to
     the statutory income tax rate of 40.0% that they would have incurred had
     we acquired them on January 1, 2001, but did not because they were not
     subject to income tax prior to their acquisition by us.


7.   Our diluted weighted average shares outstanding and diluted earnings per
     share give effect to the assumed conversion of the 7,361,964 shares
     issuable upon the conversion of $300.0 million of our 5 1/4% Convertible
     Senior Subordinated Notes due 2009 (the "Convertible Notes"). The assumed
     conversion results in the addition of $5.2 million of after-tax interest
     expense savings to reported net income for the six months ended June 30,
     2002 and $10.5 million for the year ended December 31, 2001 for the
     purposes of calculating diluted earnings per share. The assumed
     conversion of the Convertible Notes for the six months ended June 30,
     2001 were anti-dilutive, and therefore, their conversion was not assumed
     for that period.


8.   The pro forma statement of operations for the six months ended June 30,
     2001 includes the following unaudited historical financial data for our
     Acquisitions.






                                                                                             BT          SY
                                        KDI(a)          EER(a)        SPAR        EMG       FUZE     TECHNOLOGY      AIS
                                   --------------- --------------- ---------- ---------- ---------- ------------ -----------
                                                                         (IN MILLIONS)
                                                                                            
Sales ............................    $   16.2        $   49.3      $  48.1    $  33.0     $ 13.4     $  30.6     $  435.5
Costs and expenses ...............        16.6            47.4         41.5       30.4       13.7        27.9        428.2
                                      --------        --------      -------    -------     ------     -------     --------
 Operating income (loss) .........        (0.4)            1.9          6.6        2.6       (0.3)        2.7          7.3
Interest and other income
 (expense) .......................        (1.6)(b)        (4.0)(c)      0.5         --         --          --         (0.7)
Interest expense .................         0.3              --           --         --         --         0.1           --
                                      --------        --------      -------    -------     ------     -------     --------
 Income (loss) before
   income taxes ..................        (2.3)           (2.1)         7.1        2.6       (0.3)        2.6          6.6
Income tax provision
 (benefit) .......................          --              --          2.7         --         --          --          3.6
                                      --------        --------      -------    -------     ------     -------     --------
 Income (loss) from
   continuing operations .........    $   (2.3)       $   (2.1)     $   4.4    $   2.6    $  (0.3)    $   2.6     $    3.0
                                      ========        ========      =======    =======    =======     =======     ========




                                       PKI     ACQUISITIONS
                                   ---------- -------------
                                        
Sales ............................   $ 41.1     $  667.2
Costs and expenses ...............     43.6        649.3
                                     ------     --------
 Operating income (loss) .........     (2.5)        17.9
Interest and other income
 (expense) .......................     (0.1)        (5.9)
Interest expense .................       --          0.4
                                     ------     --------
 Income (loss) before
   income taxes ..................     (2.6)        11.6
Income tax provision
 (benefit) .......................     (1.0)         5.3
                                     ------     --------
 Income (loss) from
   continuing operations .........  $  (1.6)    $    6.3
                                    =======     ========


----------
(a)  Represents historical results of operations for the four-month period
     ended April 30, 2001.

(b)  Includes a charge to write-down excess inventory of $1.7 million.

(c)  Includes a charge of $4.2 million of investment banking fees and other
     non-recurring charges.


                                        9


                    NOTES TO UNAUDITED PRO FORMA CONDENSED
               CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

9. Adjustments to costs and expenses relating to the Acquisitions are presented
   in the table below:






                                                           SIX MONTHS
                                                             ENDED          YEAR ENDED
                                                         JUNE 30, 2001   DECEMBER 31, 2001
                                                        --------------- ------------------
                                                                  (IN MILLIONS)
                                                                  
     Eliminate historical goodwill amortization
       for AIS, EMG, Spar and PKI(a) ..................     $ (15.5)         $ (30.7)
     Increase to goodwill amortization for KDI and EER
       for higher goodwill recorded by L-3 than their
       historical amounts of goodwill(a) ..............         0.7              0.7
                                                            -------          -------
        Total pro forma adjustments to costs and
          expenses ....................................     $ (14.8)         $ (30.0)
                                                            =======          =======


----------
(a)  In accordance with Statement of Financial Accounting Standards ("SFAS")
     No. 142, no goodwill amortization expenses would have been recorded by us
     in 2001 for the acquisitions of EMG, Spar, BT Fuze, SY, AIS and PKI
     because these acquisitions were completed after June 30, 2001.
     Additionally, in accordance with SFAS No. 142, effective January 1, 2002
     goodwill amortization is no longer being recorded for any of the
     Acquisitions.


     The assets and liabilities recorded in connection with the purchase price
     allocations for the Acquisitions are all based upon preliminary estimates
     of fair values for contracts in process, estimated costs in excess of
     billings to complete contracts in process, inventories, identifiable
     intangibles and deferred taxes. Actual adjustments will be based on the
     final purchase prices and final appraisals and other analyses of fair
     values which are in process. With the exception of the AIS acquisition,
     we do not expect the differences between the preliminary and final
     purchase price allocations for the acquisitions to be material. Material
     differences between the preliminary and final purchase price allocations
     for the AIS acquisition could result from the valuation of contracts in
     process, estimated costs in excess of billings to complete contracts in
     process, identifiable intangibles, deferred income taxes and pension and
     postretirement benefits and other items. A review of the contracts in
     process and identifiable intangible assets included in the AIS
     acquisition is being performed. All of the data required to prepare this
     review and the related valuations is not currently available and at this
     time it is not practicable to reasonably estimate these valuations. In
     addition, no adjustment has been made to contracts in process which will
     be valued at their estimated contract prices less the estimated costs to
     complete and an allowance for a normal profit on the effort to complete
     such contracts. Although the final purchase price allocation for the
     contracts in process, estimated costs in excess of billings to complete
     contracts in process, deferred taxes and pension and postretirement
     benefits of AIS could materially affect the amount of goodwill recorded
     for AIS, such final purchase price allocations are not expected to have a
     material effect on our results of operations. Furthermore, any allocation
     of purchase price to identifiable intangible assets with finite lives
     will result in additional amortization expense and a reduction to the
     estimated goodwill for AIS. For example, an allocation of $50.0 million
     to identifiable intangible assets with a 10 year life would result in an
     increase of $5.0 million per annum to costs and expenses and a decrease
     of $3.0 million per annum to income from continuing operations.

10.  The pro forma adjustments for the Offerings for the six months ended June
     30, 2001 and the year ended December 31, 2001 do not include an
     extraordinary charge of $16.2 million ($9.9 million after-tax) related to
     the repurchase and redemption of our $225.0 million 10 3/8% Senior
     Subordinated Notes due 2007. The extraordinary charge includes the call
     premium of 5.188% or approximately $11.7 million and fees and other
     expenses of approximately $4.5 million, including the write-off of the
     unamortized deferred debt issue costs on the $225.0 million 10 3/8% Senior
     Subordinated Notes due 2007. The extraordinary charge is not included in
     the pro forma adjustments because it is not a component of income (loss)
     from continuing operations. However, had the repurchase and redemption
     occurred on January 1, 2001, the extraordinary charge would


                                       10


                    NOTES TO UNAUDITED PRO FORMA CONDENSED
               CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

     have reduced pro forma basic earnings per common share by $0.11 and pro
     forma diluted earnings per common share by $0.10 for the six months ended
     June 30, 2001 and for the year ended December 31, 2001.

11.  Our basic and diluted weighted average common shares outstanding for the
     six months ended June 30, 2001 were increased by 6.1 million shares, and
     for the year ended December 31, 2001 were increased by 3.1 million shares
     of common stock to give effect to the assumed completion of our May 2001
     Common Stock Offering as of January 1, 2001.

12.  The pro forma statement of operations for the year ended December 31,
     2001 includes the following unaudited historical financial data for our
     Acquisitions.





                                        KDI(a)          EER(a)         SPAR(b)
                                   --------------- --------------- ---------------
                                                    (IN MILLIONS)
                                                          
Sales ............................    $   16.2        $   49.3        $   76.9
Costs and expenses ...............        16.6            47.4            67.8
                                      --------        --------        --------
 Operating income (loss) .........        (0.4)            1.9             9.1
Interest and other income
 (expense) .......................        (1.6)(d)        (4.0)(e)        (0.4)(f)
Interest expense .................         0.3              --              --
                                      --------        --------        --------
 Income (loss) before
   income taxes ..................        (2.3)           (2.1)            8.7
Income tax provision
 (benefit) .......................          --              --             3.3
                                      --------        --------        --------
 Income (loss) from
   continuing operations .........    $   (2.3)       $   (2.1)       $    5.4
                                      ========        ========        ========




                                                       BT           SY
                                        EMG(b)      FUZE(c)   TECHNOLOGY(c)      AIS         PKI     ACQUISITIONS
                                   --------------- --------- --------------- ----------- ---------- -------------
                                                       (IN MILLIONS)
                                                                                  
Sales ............................    $   52.2      $  34.7      $  62.0      $  918.6     $ 86.1    $  1,296.0
Costs and expenses ...............        49.1         32.8         56.5         876.7       88.6       1,235.5
                                      --------      -------      -------      --------     ------    ----------
 Operating income (loss) .........         3.1          1.9          5.5          41.9       (2.5)         60.5
Interest and other income
 (expense) .......................        (3.8)(g)       --           --          (1.4)      (0.1)        (11.3)
Interest expense .................          --           --          0.2            --         --           0.5
                                      --------      -------      -------      --------     ------    ----------
 Income (loss) before
   income taxes ..................        (0.7)         1.9          5.3          40.5       (2.6)         48.7
Income tax provision
 (benefit) .......................         0.3           --           --          22.1       (1.0)         24.7
                                      --------      -------      -------      --------     ------    ----------
 Income (loss) from
   continuing operations .........    $   (1.0)     $   1.9      $   5.3      $   18.4    $  (1.6)   $     24.0
                                      ========      =======      =======      ========    =======    ==========


----------
(a)  Represents historical results of operations for the four-month period
     ended April 30, 2001.
(b)  Represents historical results of operations for the ten-month period
     ended October 31, 2001.
(c)  Represents historical results of operations for the eleven-month period
     ended November 30, 2001.
(d)  Includes a charge to write-down excess inventory of $1.7 million.
(e)  Includes a charge of $4.2 million for investment banking fees and other
     non-recurring charges.
(f)  Includes a $1.4 million restructuring charge.
(g)  Includes a $3.8 million restructuring charge.

     The historical results of operations for KDI, EER, BT Fuze and SY do not
     include a provision for income taxes because they each were either an S
     Corporation or a Limited Liability Company and the income taxes on their
     income were paid by their individual stockholders rather than the
     entities.



                                       11


                              PLAN OF DISTRIBUTION


     We have been advised that the distribution of the common stock by the
selling stockholders may be effected from time to time in one or more
transactions (which may involve block transactions): (1) on the New York Stock
Exchange or such other national security exchanges on which our common stock
are listed, in transactions that may include special offerings and exchange
distributions pursuant to and in accordance with the rules of such exchanges,
(2) in the over-the-counter market, or (3) in transactions otherwise than on
such exchanges or in the over-the-counter market, or in a combination of any
such transactions. Such transactions may be effected by the selling
stockholders at market prices prevailing at the time of sale, at prices
related to such prevailing market prices, at negotiated prices or at fixed
prices. The selling stockholders may effect such transactions by selling the
common stock to or through broker-dealers and such broker-dealers will receive
compensation in the form of discounts or commissions from the selling
stockholders and may receive commissions from the purchasers of the common
stock for whom they may act as agent (which discounts or commissions from the
selling stockholders or such purchasers will not exceed those customary in the
type of transactions involved).


     Any broker-dealers that participate with the selling stockholders in the
distribution of the common stock may be deemed to be "underwriters" within the
meaning of the Securities Act, and any commissions or discounts received by
such broker-dealers and any profit on the resale of the common stock by such
broker-dealers might be deemed to be underwriting discounts and commissions
under such act.


     Upon being notified by the selling stockholders that any material
arrangement has been entered into with a broker or dealer for the sale of the
common stock through a secondary distribution, or a purchase by a broker or
dealer, a supplemented prospectus will be filed, if required, pursuant to Rule
424(b) under the Securities Act, disclosing:


     o   The names of such broker-dealers;

     o   The number of shares involved;

     o   The price at which such shares are being sold;

     o   The commission paid or the discounts or concessions allowed to such
         broker-dealer;

     o   Where applicable, that such broker-dealers did not conduct any
         investigation to verify the information set out or incorporated by
         reference in this prospectus, as supplemented; and

     o   Other facts material to the transaction.


                                       12


                              AVAILABLE INFORMATION

     We are subject to the informational requirements of the Securities
Exchange Act of 1934 and, in accordance therewith, file reports and other
information with the SEC. Such reports and other information can be inspected
and copied at the Public Reference Section of the SEC located at Room 1024,
Judiciary Plaza, 450 Fifth Street, N.W., Washington D.C. 20549 and at a
regional public reference facility maintained by the SEC located at Citicorp
Center, 500 West Madison Street, Suite 1400, Chicago, Illinois 60661. Copies
of such material can be obtained from the Public Reference Section of the SEC
at prescribed rates. Such material may also be accessed electronically by
means of the SEC's home page on the Internet (http://www.sec.gov).

     As permitted by the rules and regulations of the SEC, this prospectus
omits certain information contained in the registration statement on Form S-3,
as amended, of which this prospectus is a part. For further information with
respect to the Company and the common stock, reference is made to the
registration statement and the exhibits thereto.


                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The SEC allows us to "incorporate by reference" the information contained
in documents that we file with them, which means that we can disclose
important information to you by referring you to those documents. The
information incorporated by reference is considered to be part of this
prospectus. Information in this prospectus supersedes information incorporated
by reference that we filed with the SEC prior to the date of this prospectus,
while information that we file later with the SEC will automatically update
and supersede this information. We incorporate by reference the documents
listed below and any future filings we will make with the SEC under Sections
13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934:

     o   Description of our common stock contained in our registration
         statement on Form S-3/A dated June 19, 2002 (File No. 333-84826);

     o   Our Annual Report on Form 10-K for the fiscal year ended December 31,
         2001, as amended by our Annual Report on Form 10-K/A-1 dated June 19,
         2002;

     o   Our Quarterly Report on Form 10-Q for the three month period ended
         March 31, 2002;

     o   Our Quarterly Report on Form 10-Q for the three month period ended
         June 30, 2002;

     o   Our Current Report on Form 8-K dated March 22, 2002;

     o   Our Current Report on Form 8-K dated April 24, 2002;

     o   Our Current Report on Form 8-K dated June 6, 2002;

     o   Our Current Report on Form 8-K dated June 19, 2002, which includes
         our revised consolidated financial statements for the fiscal year
         ended December 31, 2001; and

     o   Our Current Report on Form 8-K dated June 28, 2002.

     You can request a copy of these filings at no cost, by writing or calling
us at the following address:

                        L-3 Communications Holdings, Inc.
                        600 Third Avenue
                        New York, New York 10016
                        (212) 697-1111
                        Attention: Corporate Secretary.

     You should only rely on the information incorporated by reference or
provided in this prospectus. We have not authorized anyone else to provide you
with different information. This prospectus shall not constitute an offer of
shares of common stock in any state where the offer is not permitted. You
should not assume that the information in this prospectus is accurate as of
any date other than the date on the front of this document.


                                       13


                                  LEGAL MATTERS


     The validity of the common stock offered by this prospectus will be
passed upon by Simpson Thacher & Bartlett, New York, New York.


                                     EXPERTS


     The following financial statements have been incorporated by reference in
this prospectus in reliance of the reports of PricewaterhouseCoopers LLP,
independent accountants, given on their authority as experts in accounting and
auditing:


     o   Our consolidated financial statements as of December 31, 2001 and
         2000 and for the three years ended December 31, 2001 incorporated by
         reference in this prospectus from our Current Report on Form 8-K
         dated June 19, 2002; and


     o   The combined financial statements of Aircraft Integration Systems
         Business as of December 31, 2001 and 2000 and for the three years
         ended December 31, 2001 incorporated by reference in this prospectus
         from our Current Report on Form 8-K dated March 22, 2002.


                                       14


                       L-3 COMMUNICATIONS HOLDINGS, INC.






                         448,582 SHARES OF COMMON STOCK






                             ---------------------
                                   PROSPECTUS
                                OCTOBER 31, 2002
                             ---------------------