Airworthiness Directive · Amendment 39-13135 · General Electric Company CF6-50 Series Turbofan Engines
General Electric Company CF6-50 Series Turbofan Engines
This airworthiness directive (AD) is applicable to General Electric Company CF6-50 series turbofan engines with low pressure turbine (LPT) stage 1 disks, part number (P/N) 9061M21P03, serial numbers (SNs) SNL17693, SNL17694, SNL44200, SNL47624, SNL47625, SNL47626, SNL47627, and SNL47628 installed. These engines are installed on, but not limited to Airbus Industrie A300, Boeing 747, and McDonnell Douglas DC-10 airplanes.
This amendment adopts a new airworthiness directive (AD), that is applicable to General Electric Company (GE) CF6-50 series turbofan engines. This amendment requires removal from service of eight serial number (SN) low-pressure turbine (LPT) stage 1 disks, part number (P/N) 9061M21P03, at the next engine shop visit. This amendment is prompted by a report of the potential for iron-rich inclusions introduced during manufacture in the affected disks. The actions specified by this AD are intended to prevent LPT stage 1 disk cracking, due to iron-rich inclusions introduced during manufacture, leading to uncontained disk failure.
