TURBOMECA Arriel 2B1 [Docket No. FAA-2007-27009; Directorate Identifier 2007-NE-02-AD] – proposes to supersede AD 2007-19-09R1, which applies to affected engines that do not have modification TU157 incorporated. AD 2007-19-09R1 requires replacement of the hydromechanical metering unit (HMU) with a...

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