AD 2014-04-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Turbomeca | S | Airworthiness Directives; Turbomeca S.A. Turboshaft Engines |
Unsafe Condition
Deterioration of the splines on the high pressure (HP)/low pressure (LP) pump assembly drive shaft of the hydro-mechanical metering unit (HMU), which eventually interrupted the fuel supply to the engine.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform initial and repetitive inspections of the HMU high-pressure pump drive gear shaft splines and sleeve assembly splines for wear, corrosion, scaling, or cracks. Clean and inspect the sleeve assembly splines. Replace the HMU if it fails inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within specified HMU operating hours after the effective date, depending on HMU operating history.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Turbomeca S.A. Arrius 2B1, 2B1A, 2B2, and 2K1 turboshaft engines.
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.