Summary
The Federal Aviation Administration (FAA) proposes to adopt a new airworthiness directive (AD) that is applicable to GE Aircraft Engines (GE) CT7 series turboprop engines. This proposal would require 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 proposal is prompted by a report of a stage 2 turbine aft cooling plate cracking, resulting in an uncontained engine failure. The actions specified by the proposed AD are intended to prevent stage 2 turbine aft cooling plate cracking, which could result in uncontained engine failure, and damage to the airplane.