Airworthiness Directive · Amendment 39-10232 · General Electric Company CJ610 Series Turbojet and CF700 Series Turbofan Engines
General Electric Company CJ610 Series Turbojet and CF700 Series Turbofan Engines
General Electric Company (GE) CJ610 series turbojet and CF700 series turbofan engines, with turbine torque rings and compressor drive shafts identified in GE CF700 Service Bulletin (SB) No. A72-155, dated May 22, 1997, and GE CJ610 SB No. A72-147, dated May 22, 1997. These engines are installed on but not limited to the following aircraft: Learjet 20 series, Israel Aircraft Industries Westwind series, Hansa Jet, Aero Commander Jet Commander, Dassault Falcon 20 series, Sabreliner 265 series.
This amendment adopts a new airworthiness directive (AD) that is applicable to General Electric Company (GE) CJ610 series turbojet and CF700 series turbofan engines. This action requires removal from service of possibly defective turbine torque rings and compressor drive shafts which may have been manufactured from contaminated material; and replacement with serviceable parts. This amendment is prompted by a report of a cooling plate removed from a GE CT58 series engine that was found to have an iron-rich inclusion that came from a contaminated heat lot. Parts on GE CJ610 series and CF700 series engines which were manufactured from the same and similar heat lots may also be contaminated. The actions specified in this AD are intended to prevent turbine torque ring or compressor drive shaft failure due to a manufacturing defect, which could result in an uncontained engine failure.
