FAA Issues Emergency AD on GE90 Powerplants
The FAA issued an emergency airworthiness directive–2013-14-51–relating to the GE90-110B1 and -115B, which power aircraft such as the Boeing 777-200LR and 777 freighter. The July 12 AD was prompted by a report of the additional failure of a transfer gearbox assembly (TGB) radial gearshaft, outside the suspect population identified in AD 2013-10-52, which resulted in an in-flight shutdown. Two earlier failures of the TGB radial gearshaft prompted the issuance of AD 2013-10-52. The FAA calls this AD an interim action and said it expects more action to follow.