Data / Federal rules / 2026-17840
Airworthiness Directives; Airbus Helicopters
The Federal Aviation Administration published this proposed rule in the Federal Register on September 1, 2026. Comments closed on October 16, 2026.
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What the agency says
The FAA proposes to supersede Airworthiness Directive (AD) 2025-08-06, which applies to certain Airbus Helicopters Model SA330J helicopters. AD 2025-08-06 requires repetitively inspecting for a gap between the main gearbox (MGB) oil cooling fan assembly rotor blade and the upper section of the guide vane bearing housing, replacing the MGB fan rotor bearings with serviceable bearings if necessary, and at a later compliance time replacing the MGB fan rotor bearing assembly with an improved MGB fan rotor bearing assembly, which constitutes terminating action for the repetitive inspections. Since the FAA issued AD 2025-08-06, the FAA has determined that the compliance time for installing the improved MGB fan rotor bearing assembly should be extended. This proposed AD would continue to require the actions in AD 2025-08-06 and would increase the compliance time for installing the improved MGB fan rotor bearing assembly. This proposed AD would also prohibit installing any MGB fan rotor bearings and any MGB fan rotor bearing assembly, unless certain requirements are met. The FAA is proposing this AD to address the unsafe condition on these products.
Key facts
- Document number
- 2026-17840
- Type
- Proposed rule
- Action
- Notice of proposed rulemaking (NPRM)
- Agency
- Transportation Department; Federal Aviation Administration
- Published
- September 1, 2026
- Comments due
- October 16, 2026
- Dates
- The FAA must receive comments on this NPRM by October 16, 2026.
- Docket
- Docket No. FAA-2026-8790; Project Identifier MCAI-2025-01793-R
- Regulation ID (RIN)
- 2120-AA64
- Code of Federal Regulations
- 14 CFR 39
- Topics
- Air transportation; Aircraft; Aviation safety; Incorporation by reference; Safety
- Pages
- 3
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Everything from the Federal Aviation Administration · Rules on air transportation · Rules on aircraft · Rules on aviation safety · Published in September 2026
Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.