Exhibit31.1

CERTIFICATIONS

I, Frank C. Lanza, certifythat:

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| 1.  | I have reviewed this annual report onForm 10-K of L-3 Communications Holdings, Inc. and L-3 CommunicationsCorporation; |

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| 2.  | Based on myknowledge, 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)) and internal control over financialreporting (as defined in Exchange Act Rules 13a – 15(f) and15d-15(f) 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)  | designed such internal control over financialreporting, or caused such internal control over financial reporting tobe designed under our supervision, to provide reasonable assuranceregarding the reliability of financial reporting and the preparation offinancial statements for external purposes in accordance with generallyaccepted accounting principles; |

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| c)  | evaluatedthe effectiveness of the registrants' disclosure controls andprocedures and presented in this report our conclusions about theeffectiveness of the disclosure controls and procedures, as of the endof the period covered by this report based on such evaluation;and |

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| d)  | disclosed in this report any change inthe registrant's internal control over financial reporting thatoccurred during the registrants' fourth fiscal quarter that hasmaterially affected, or is reasonably likely to materially affect, theregistrants' internal control over financial reporting; and |

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| 5.  | The registrants' other certifying officer andI have disclosed, based on our most recent evaluation of internalcontrol over financial reporting, to the registrants' auditorsand the audit committee of the registrants' board of directors(or persons performing the equivalent functions): |

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| a)  | all significant deficiencies and materialweaknesses in the design or operation of internal control overfinancial reporting which are reasonably likely to adversely affect theregistrants' ability to record, process, summarize and reportfinancial information; and |

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| b)  | any fraud,whether or not material, that involves management or other employeeswho have a significant role in the registrants' internal controlover financial reporting. |

Date: March 15, 2005

/s/ Frank C.Lanza

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Frank C. LanzaChairman and Chief Executive Officer

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