AD 2016-22-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Turbomeca | S | Airworthiness Directives; Turbomeca S.A. Turboshaft Engines |
Unsafe Condition
An anomaly during the grinding operation required by modification TU376 increases the clearance between the rear curvic coupling of the centrifugal impeller and the fuel injection manifold, potentially leading to crack initiation and propagation in the centrifugal impeller bore area, resulting in centrifugal impeller failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove from service any centrifugal impeller listed in Table 1 of the AD before exceeding the applicable cycles since new (CSN) and replace with a centrifugal impeller not listed in Table 1.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the compliance times specified in the AD, unless already done.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Turbomeca S.A. Arriel 1, 1A, 1A1, 1A2, 1B, 1B2, 1C, 1C1, 1C2, 1D, 1D1, 1E, 1E2, 1K1, 1S, and 1S1 turboshaft engines with modification TU376 installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.