EASA Regulations for Pratt & Whitney Canada PT6A-30

Compressor Turbine Blade Fracture due to Non-conforming CT Vane Installation

The Canadian Airworthiness Directive CF-2019-30R1 addresses compressor turbine blade fractures caused by non-conforming compressor turbine (CT) vane installations on Pratt & Whitney Canada PT6A-34, -34B, -34AG, -114, and -114A engines. This directive updates previous information and clarifies affected CT blade part numbers, focusing on engines with CT vanes repaired under Southwest Turbine Inc. repair specification STI 72-50-254. The directive aims to prevent power loss and in-flight shutdowns resulting from CT blade failures.