AD 2013-21-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Eurocopter | France (Eurocopter) | Airworthiness Directives; Eurocopter France (Eurocopter) Helicopters |
Unsafe Condition
A crack in the yoke of the tail rotor pitch horn assembly, which may lead to failure of the pitch horn, loss of the anti-torque function, 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
Visually inspect each pitch horn for a crack in the specified areas. If a crack is found, replace the pitch horn with an airworthy one before further flight. Before installing any pitch horn, perform a dye-penetrant inspection for cracks.
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Compliance Time
Within 10 hours time-in-service for helicopters with parts exceeding 155 hours time-in-service.
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Affected Aircraft
Eurocopter Model AS350B, AS350BA, AS350B1, AS350B2, AS350B3, AS350C, AS350D, AS350D1, AS355E, AS355F, AS355F1, AS355F2, AS355N, and AS355NP helicopters with FAA type certificates.
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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