Airworthiness directives › 2005-17-17
AD 2005-17-17 Airworthiness Directives; Turbomeca S.A. Arrius 2F Turboshaft Engines
Applicability*9
This AD applies to Turbomeca S.A. Arrius 2F turboshaft engines. These engines are installed on, but not limited to, Eurocopter EC120B helicopters.
Compliance
You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done. O-Ring Replacement (f) Replace the O-ring on the check valve piston in the lubrication unit at the intervals specified in Table 1 of this AD. Use the “Instructions to be Incorporated,” 2.A. through 2.C. (2) of Turbomeca Alert Service Bulletin No. A319 79 4802, dated June 21, 2005, to replace the O-ring. Table 1.—Compliance Times for O-Ring Replacement If the class of oil is * * * Then replace the O-ring by the later of * * * Thereafter, replace the O-ring within * * * (1) HTS or unknown 300 hours time-since-new (TSN) or 50 hours after the effective date of this AD 300 hours time-since-last replacement (TSR). (2) STD 450 hours TSN or 50 hours after the effective date of this AD 500 hours TSR. Alternative Methods of
Unsafe condition
This AD results from a report of a forced landing of a Eurocopter EC120B helicopter. We are issuing this AD to prevent an uncommanded in-flight shutdown of the engine, which could result in a forced autorotation landing and damage to the helicopter.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1