Airworthiness Directive
AD 2021-26-26: Engine Controls
Airworthiness Directives; Safran Helicopter Engines, S.A. (Type Certificate Previously Held by Turbomeca S.A.) Turboshaft Engines
- Effective
- Feb 23, 2022
- Published
- Jan 19, 2022
- Registered aircraft
- 99
Models this AD may apply to
AI-extracted — verify against originalMatched from the AD's applicability section. Applicability must be confirmed by a mechanic against the aircraft's records.
Engines
- SAFRAN ARRIUS 2B1A
- SAFRAN ARRIUS 2B2
- TURBOMECA ARRIUS 2B1
- TURBOMECA ARRIUS 2B1A
- TURBOMECA ARRIUS 2B2
- Only with: Engines with an installed EECU P/N 70EMF01080 or 70EMF01090 (Arrius 2B1 without overspeed protection TU 19C), P/N 70EMF01100 or 70EMF01120 (Arrius 2B1 with overspeed protection TU 67C or TU 23C), P/N 70EMH01000 or 70EMH01010 (Arrius 2B1A), or P/N 70EMM01000 (Arrius 2B2).
- Only with: Engines with an installed EECU P/N 70EMF01080 or 70EMF01090 (Arrius 2B1 without overspeed protection TU 19C), P/N 70EMF01100 or 70EMF01120 (Arrius 2B1 with overspeed protection TU 67C or TU 23C), P/N 70EMH01000 or 70EMH01010 (Arrius 2B1A), or P/N 70EMM01000 (Arrius 2B2).
Applicability
From the AD textThis AD applies to Safran Helicopter Engines, S.A. (Type Certificate previously held by Turbomeca S.A.) Arrius 2B1, Arrius 2B1A, (including those that embody modification (mod) TU45C, identified as Arrius 2B1A_1) and Arrius 2B2 model turboshaft engines with an installed engine electronic control unit (EECU) having part number (P/N) 70EMF01080 or 70EMF01090--for Arrius 2B1 model turboshaft engines without overspeed protection option (TU 19C); P/N 70EMF01100 or P/N 70EMF01120--for Arrius 2B1 model turboshaft engines with overspeed protection option (TU 67C or TU 23C); P/N 70EMH01000 or 70EMH01010--for Arrius 2B1A model turboshaft engines; or P/N 70EMM01000--for Arrius 2B2 model turboshaft engines. Note 1 to paragraph (c): Turbomeca Mandatory Service Bulletin (MSB) No. 319 73 2082, Version D, dated June 6, 2011, references Arrius 2B1A_1 model turboshaft engines. Arrius 2B1A model turboshaft engines with mod TU 45C applied are identified as Arrius 2B1A_1 on the engine identification plate.
Related ADs
Supersedes or revises AD 2005-12-08.
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