AD 2016-04-12
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Turbomeca | S | Airworthiness Directives; Turbomeca S.A. Turboshaft Engines |
Unsafe Condition
Rupture of the 41-tooth gear, which forms part of the bevel gear in the engine accessory gearbox (AGB), leading to uncommanded in-flight shutdown (IFSD).
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform an initial Spectrometric Oil Analysis (SOA) within specified compliance times based on engine hours. Depending on aluminum concentration results, repeat SOA at intervals or remove the engine AGB from service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 engine hours after the effective date of this AD, or before exceeding 850 engine hours since new or last overhaul, depending on engine hours.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Turbomeca S.A. Arriel 2B, 2B1, 2C, 2C1, 2C2, 2D, 2E, 2S1, and 2S2 turboshaft engines with engine accessory gearbox (AGB), part number 0292120650, with a machined front casing.
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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