AD 2013-09349
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Turbomeca | S | Airworthiness Directives; Turbomeca S.A. Turboshaft Engines |
Unsafe Condition
Inaccurate cycle-counting results of the tachometer can lead to exceeding life limits on critical rotating parts, which can cause uncontained engine failure and damage to the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Daily post-flight checks of the engine tachometer's unit cycle-counting feature are required, verifying agreement with the primary counting method. Ground-run functional checks of the tachometer unit cycle-counting feature are required every 1,000 operating hours, in addition to daily inspections. If the tachometer fails the check, only the primary cycle-counting method should be used.
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Compliance Time
Within 50 flight hours after the effective date of the AD.
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Affected Aircraft
Turbomeca S.A. Arriel 1A1, 1A2, 1B, 1C, 1C1, 1C2, 1D, 1D1, 1E2, 1K1, 1S, and 1S1 turboshaft engines that have incorporated Modification TU 207 or TU 243, or have incorporated Turbomeca Service Bulletin (SB) No. 292 80 0168 or SB No. 292 80 0190.
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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