TURBOMECA Arriel 2B and 2B1 engines [Docket No. FAA-2011-0115; Directorate Identifier 2010-NE-40-AD; Amendment 39-16728; AD 2011-13-05] – Insert blade dampers between the gas generator (GG) turbine disc and the GG turbine blade platform, per the instructions of Turbomeca Mandatory Service Bulletin...

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