AD Amdt-39-10969
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Westland | Various | Airworthiness Directives; Westland Helicopters Ltd. 30 Series 100 and 100-60 Helicopters |
Unsafe Condition
Failure of conformal pinion quill shafts installed in certain main rotor gearboxes (MRGB) that do not pass a magnetic drain plug inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the magnetic drain plug of the installed MRGB. If the magnetic drain plug passes inspection, the MRGB may remain in service for up to 100 additional hours after the effective date of the AD. If the magnetic drain plug fails inspection, remove the MRGB from service and replace the conformal pinion quill shaft with an airworthy one in accordance with the Westland Maintenance Manual.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Westland Helicopters Ltd. 30 Series 100 and 100-60 helicopters, certificated in any category, with MRGBs having specific serial numbers or a history of shock loading.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.