AD Amdt-39-10632
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Eurocopter | Deutschland GmbH Model EC 135 | Airworthiness Directives; Eurocopter Deutschland GmbH Model EC 135 Helicopters |
Unsafe Condition
Loose bearings and attachment bolts, and cracked bearing supports in the tail rotor drive shaft can cause excessive vibrations leading to loss of drive to the tail rotor and subsequent loss of control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Review aircraft records to verify tail rotor drive shaft vibration survey and Fenestron Shaft Retrofit Kit installation. Inspect tail rotor drive shaft bearing attaching lock plates for bent-open tabs, broken or missing slippage marks, and visually inspect bearing supports for cracks before further flight. Repeat inspections at intervals not exceeding 15 hours time-in-service.
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
Eurocopter Deutschland GmbH Model EC 135 helicopters
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.