AD 2013-24-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Turbomeca | S | Airworthiness Directives; Turbomeca S.A. Turboshaft Engines |
Unsafe Condition
A loss of FT bearing lubrication, resulting in FT module failure, damage to the engine, and damage to the aircraft.
Required Actions
Inspect the FT module (M04) within 50 flight hours (FHs) from the effective date of this AD for Arriel 1B, 1D, and 1D1 engines, and within 300 FHs for Arriel 1A1, 1A2, 1C, 1C1, 1C2, 1E2, 1K1, 1S, and 1S1 engines. Use the instructions in paragraph 6 of Turbomeca S.A. Alert MSB No. A292 72 0838, Version A, dated May 24, 2013, to do the inspection. If you find that the FT module (M04) is not eligible for return to service, remove the FT module (M04) before further flight.
Compliance Time
Within 50 flight hours (FHs) from the effective date of this AD for Arriel 1B, 1D, and 1D1 engines, and within 300 FHs for Arriel 1A1, 1A2, 1C, 1C1, 1C2, 1E2, 1K1, 1S, and 1S1 engines.
Affected Aircraft
Turbomeca S.A. Arriel 1A1, 1A2, 1B, 1C, 1C1, 1C2, 1D, 1D1, 1E2, 1K1, 1S, and 1S1 turboshaft engines equipped with free turbine (FT) module (M04) identified by the part and serial numbers listed in Figure 2 of Turbomeca S.A. Alert Mandatory Service Bulletin (MSB) No. A292 72 0838, Version A, dated May 24, 2013.
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.