TURBOMECA Arriel 2B, 2B1, and 2B1A turboshaft engines [Docket No. FAA-2006-23809; Directorate Identifier 2005-NE-52-AD] – proposes to supersede AD 2007-10-07, which currently requires an inspection of the splines of the coupling assembly and the hydro-mechanical metering unit (HMU) drive gear shaft...

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