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AD 2025-03698

Published 2025-03-07 · 1 model · 3 US-registered tails affected · Federal Register

Airworthiness Directives; Airbus Helicopters Federal Register ↗

Abstract

The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Model EC 155B, EC155B1, SA-365N, SA-365N1, AS-365N2, and AS 365 N3 helicopters. This AD prompted by an engine compartment fire where the upper stiffener of the central firewall in the engine compartment was found damaged. This AD requires replacing the aluminum central firewall stiffener with a titanium central firewall stiffener and prohibits installing an aluminum central firewall stiffener. These actions are specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

Applicability · by US fleet size

  • AIRBUS HELICOPTERS EC155B1 3 tails

Federal Register text

Verbatim; the Federal Register publication is the legally binding document. Cite: 90 FR 11473. View on Federal Register ↗

[Federal Register Volume 90, Number 44 (Friday, March 7, 2025)] [Rules and Regulations] [Pages 11473-11475] From the Federal Register Online via the Government Publishing Office [www.gpo.gov] [FR Doc No: 2025-03698]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2024-2147; Project Identifier MCAI-2022-01515-R; Amendment 39-22967; AD 2025-04-09] RIN 2120-AA64

Airworthiness Directives; Airbus Helicopters

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Model EC 155B, EC155B1, SA-365N, SA-365N1, AS-365N2, and AS 365 N3 helicopters. This AD prompted by an engine compartment fire where the upper stiffener of the central firewall in the engine compartment was found damaged. This AD requires replacing the aluminum central firewall stiffener with a titanium central firewall stiffener and prohibits installing an aluminum central firewall stiffener. These actions are specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

DATES: This AD is effective April 11, 2025. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of April 11, 2025.