Exhibit31.1

CERTIFICATIONS

I, Frank C. Lanza, certifythat:

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| 1.   | I have reviewed this annualreport on Form 10-K of L-3 Communications Holdings, Inc. and L-3Communications Corporation; |

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| 2.  | Basedon my knowledge, this report does not contain any untrue statement of amaterial fact or omit to state a material fact necessary to make thestatements made, in light of the circumstances under which suchstatements were made, not misleading with respect to the period coveredby this report; |

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| 3.  | Based on myknowledge, the financial statements, and other financial informationincluded in this report, fairly present in all material respects thefinancial condition, results of operations and cash flows of theregistrants as of, and for, the periods presented in this report; |

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| 4.  | The registrants' othercertifying officer and I are responsible for establishing andmaintaining disclosure controls and procedures (as defined in ExchangeAct Rules 13a-15(e) and 15d-15(e)) for the registrants and have: |

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| a)   | designed such disclosure controls andprocedures, or caused such disclosure controls and procedures to bedesigned under our supervision, to ensure that material informationrelating to the registrants, including their consolidated subsidiaries,is made known to us by others within those entities, particularlyduring the period in which this report is being prepared; |

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| b)  | evaluated the effectiveness of theregistrants' disclosure controls and procedures and presented inthis report our conclusions about the effectiveness of the disclosurecontrols and procedures, as of the end of the period covered by thisreport based on such evaluation;and |

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| c)  | disclosed in this reportany change in the registrants' internal control over financialreporting that occurred during the registrants' fourth fiscalquarter that has materially affected, or is reasonably likely tomaterially affect, the registrants' internal control overfinancial reporting; and |

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| 5.   | Theregistrants' other certifying officer and I have disclosed, basedon our most recent evaluation of internal control over financialreporting, to the registrants' auditors and the audit committeeof the registrants' board of directors (or persons performing theequivalent functions): |

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| a)  | allsignificant deficiencies and material weaknesses in the design oroperation of internal control over financial reporting which arereasonably likely to adversely affect the registrants' ability torecord, process, summarize and report financial information; and |

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| b)   | any fraud, whether or not material, thatinvolves management or other employees who have a significant role inthe registrants' internal control over financial reporting. |

Date: March 4, 2004

/s/Frank C.Lanza                                    

Frank C. Lanza

Chairman andChief Executive Officer

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