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Department of Transportation
Federal Aviation Administration
• 14 CFR Part 39
• [Docket No. FAA-2025-1350; Project Identifier MCAI-2024-00510-R; Amendment 39-23196; AD 2025-24-01]
• RIN 2120-AA64
AGENCY:
Federal Aviation Administration (FAA), DOT.
ACTION:
Final rule.
SUMMARY:
The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Model EC 155B and EC 155B1 helicopters. This AD was prompted by a determination that the required forces to jettison the windows exceed the maximum jettisoning effort requirements and the development of a modification of the jettisonable windows. This AD requires replacement of the jettisonable windows and seals on the sliding doors and fixed panels on the left-hand and right-hand sides. This AD also requires the installation of new labels. The FAA is issuing this AD to address the unsafe condition on these products.
DATES:
This AD is effective January 12, 2026.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of January 12, 2026.
ADDRESSES:
AD Docket:
You may examine the AD docket at
regulations.gov
under Docket No. FAA-2025-1350; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this final rule, the mandatory continuing airworthiness information (MCAI), any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.
Material Incorporated by Reference:
• For European Union Aviation Safety Agency (EASA) material identified in this AD, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; phone: +49 221 8999 000; email:ADs@easa.europa.eu;
website:
easa.europa.eu.
• You may view this material at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Parkway, Room 6N-321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call (817) 222-5110. It is also available atregulations.gov
under Docket No. FAA-2025-1350.
FOR FURTHER INFORMATION CONTACT:
Adam Hein, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: (316) 946-4116; email:
adam.hein@faa.gov.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to all Airbus Helicopters Model EC 155B and EC 155B1 helicopters. The NPRM was published in the
Federal Register
on July 2, 2025 (90 FR 28913). The NPRM was prompted by AD 2024-0173, dated September 4, 2024 (EASA AD 2024-0173) (also referred to as the MCAI), issued by EASA, which is the Technical Agent for the Member States of the European Union. The MCAI states that during tests concerning jettisoning of windows on a Model EC 155 helicopter, it was identified that the required forces to jettison the windows exceed the maximum jettisoning effort requirements. The MCAI …
Fonte: Federal Register (federalregister.gov). Texto original em inglês.