Friday, May 20, 2011
Eurocopter AS350B, EC130 Models Receive AD
The FAA issued an airworthiness directive (AD) FAA-2010-1228 May 18 for Eurocopter France (ECF) Models AS350B, B1, B2, B3, BA and EC130 B4s with ARRIEL engines which is intended to prevent failure of a pinion and a fuel pump, engine flameout, and subsequent loss of control of the helicopter. The AD becomes effective June 22, 2011.
The final rule AD applies to helicopter models with ARRIEL engines with Aircraft Parts corporation starter-generators, part number 150SG122Q or P/N 200SGL130Q, without “004” marked on the identification plate, installed, certificated in any category.
The directive results from a mandatory continuing airworthiness information (MCAI) AD issued by the aviation authority of the European Aviation Safety Agency (EASA). The superseding MCAI AD states that several engine flameouts have involved failure of the 41-tooth pinion in the engine accessory gearbox. Failure of the pinion causes the engine fuel pump to stop operating, resulting in an engine flameout. The EASA AD requires a new adjustment procedure to optimize the performance of the specified starter-generator damping assembly.