AD 2013-22-22
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Turbomeca | S | Airworthiness Directives; Turbomeca S.A. Turboshaft Engines |
Unsafe Condition
Deterioration of hydromechanical metering unit (HMU) rotating components.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the inter-pump complete sleeve and visually inspect the complete sleeve female splines and HMU high-pressure (HP) pump and low-pressure (LP) pump male splines for corrosion, scaling, cracks, and wear. Replace the rotating components of the HP and LP pumps, including the complete sleeve, or replace the HMU with an eligible HMU at specified intervals.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 25 HMU operating hours if the HMU has more than 375 operating hours on the effective date of this AD; otherwise, before exceeding 400 HMU operating hours since new.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Turbomeca S.A. Arriel 2D turboshaft engines.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.