Airworthiness Directive · Amendment 39-12594 · GE Aircraft Engines CT7 Series Turboprop Engines
GE Aircraft Engines CT7 Series Turboprop Engines
This airworthiness directive (AD) is applicable to GE Aircraft Engines (GE) CT7 Models CT7-5A2, -5A3, -7A, and -7A1 turboprop engines with part number (P/N) 6064T07P02 stage 2 aft cooling plates with serial numbers beginning with the letters GFF, installed on but not limited to Construcciones Aeronauticas, SA CN- 235 series and SAAB Aircraft AB SF340 series airplanes.
This amendment adopts a new airworthiness directive (AD), that is applicable to GE Aircraft Engines (GE) CT7 series turboprop engines. This amendment requires removal of stage 2 turbine aft cooling plates of a certain part number (P/N) and installation of cooling plates of a new design. This amendment is prompted by a report of a stage 2 turbine aft cooling plate cracking, resulting in an uncontained engine failure. The actions specified by this AD are intended to prevent stage 2 turbine aft cooling plate cracking, which could result in uncontained engine failure, and damage to the airplane.
