AD 2012-12-20
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Turbomeca | S | Airworthiness Directives; Turbomeca S.A. Turboshaft Engines |
Unsafe Condition
A malfunction in the digital engine control unit (DECU) could lead to loss of automatic control on one or both engines installed on the same helicopter, resulting in an uncommanded in-flight engine shutdown, forced autorotation landing, or accident.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace affected DECUs listed in Table 1 of the AD. For helicopters with two DECUs, replace one within 50 engine hours after the effective date, and the other within 1,000 engine hours or 12 months, whichever occurs first. For helicopters with one DECU, replace it within the same timeframe.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 engine hours for the first DECU replacement, and within 1,000 engine hours or 12 months for the second replacement.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Turbomeca S.A. Arriel 2C1, 2C2, and 2S2 turboshaft engines with any of the digital engine control units (DECUs) listed in Table 1 of the AD installed.
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.