AD Amdt-39-11439
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Eurocopter | Deutschland GmbH Model EC135 P1 and T1 | Airworthiness Directives; Eurocopter Deutschland GmbH Model EC135 P1 and T1 Helicopters |
Unsafe Condition
Discovery of a crack in the tail boom connecting frame flange at the attachment points of the tail rotor drive shaft bearing support, which could lead to a fracture of the bearing frame flange, failure of the tail rotor drive shaft, and subsequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect and replace, if necessary, the tail boom connecting frame flange before further flight and at specified intervals until a modified frame flange is installed. Within 7 days, install an additional bearing support on the frame flange. Visually inspect the frame flange for cracks or misalignment of slippage marks at specified intervals thereafter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight and at specified intervals thereafter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Eurocopter Deutschland GmbH Model EC135 P1 and T1 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
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