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Wednesday, May 23, 2012

FAA, EASA Issue Emergency ADs for EC135

The European Aviation Safety Agency (EASA) and U.S. FAA have published emergency airworthiness directives (ADs) requiring operators of the Eurocopter EC135 to inspect the main rotor hub (MRH) after a crack was discovered during a periodical inspection. The AD requires operators to immediately (and at intervals of six hours thereafter) check the lower MRH shaft flange and the visible upper MRH shaft flange for cracking.
FAA considers the inspection to be an “interim action. [Eurocopter] is currently developing a modification that will address the unsafe condition,” according to the AD. FAA estimates that the AD will affect 244 helicopter operators on the U.S. registry. The variants involved in the FAA directive are the EC135 P1, P2, P2+, T1, T2 and T2+. The EASA directive also covers the EC625 P1, T1 and T2+.
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