airworthiness · Rule · Final rule. · Published 2026-08-13 · Effective 2026-09-17 · 91 FR 52231
Document
Document number
2026-16505
Federal Register citation
91 FR 52231
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Airbus
Publication date
2026-08-13
Effective date
2026-09-17
FAA docket
Docket No. FAA-2025-3420
Abstract
The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Model AS355E, AS355F, AS355F1, AS355F2, and AS355N helicopters. This AD was prompted by reports of cracks in the legs of the side supports of the tail rotor transmission fan. This AD requires repetitively inspecting the side supports of the tail rotor transmission fan for cracks and, depending on the results, replacing both side supports. The FAA is issuing this AD to address the unsafe condition on these products.