AD 2011-10-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; Eurocopter France Model AS350B, B1, B2, B3, BA, and EC130 B4 Helicopters |
Unsafe Condition
Failure of the 41-tooth pinion in the engine accessory gearbox, caused by an inoperative torque damping system of the starter-generator due to incorrect adjustment, leading to bending stresses on the pinion. This failure causes the engine fuel pump to stop operating, resulting in an engine flameout.
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Required Actions
Replace the cup springs and fan nut, functionally test the damping system, and mark '004' on the identification plate of the APC starter-generator. Comply with the requirements of this AD before installing an APC starter-generator with part numbers 150SG122Q or 200SGL130Q.
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Compliance Time
Within 110 hours time-in-service (TIS) or 3 months, whichever occurs first.
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Affected Aircraft
Eurocopter France Model AS350B, B1, B2, B3, BA, and EC130 B4 helicopters with ARRIEL engines and Aircraft Parts Corporation (APC) starter-generators, part numbers 150SG122Q or 200SGL130Q, without '004' marked on the identification plate.
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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