Airworthiness directives › 2018-07-17
AD 2018-07-17 Airworthiness Directives; Safran Helicopter Engines, S.A., Turboshaft Engines
Applicability*9
This AD applies to Safran Helicopter Engines, S.A., Arrius 2B1, 2B1A, 2B2, and 2K1 turboshaft engines with a power turbine wheel (PTW) assembly having a serial number listed in Appendix 2.1 of Safran Helicopter Engines Mandatory Service Bulletin (MSB) No. A319 72 2854, Version A, dated February 9, 2018.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 20 flight hours or 30 days after the effective date of this AD, whichever occurs first: (1) Inspect the PTW in accordance with paragraph 2.4.2.3 of Safran Helicopter Engines MSB No. A319 72 2854, Version A, dated February 9, 2018; and (2) If, as a result of the inspection required by paragraph (g)(1) of this AD, any dampers are found missing, replace the PTW with a part eligible for installation before further flight.
Unsafe condition
This AD was prompted by an engine failure caused by missing turbine blade dampers. We are issuing this AD to prevent failure of a power turbine blade. The unsafe condition, if not addressed, could result in loss of engine power in flight and reduced control of the helicopter.
Affected ADs
None.
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