ALLISON ENGINE COMPANY Model 250-C47B turboshaft engines
ALLISON ENGINE COMPANY Model 250-C47B turboshaft engines (Docket No. 97-ANE-40-AD) - supersedes existing AD 97-21-09, which requires replacing the engine main electrical harness assembly with an improved assembly, the installation of a new hydromechanical unit (HMU) and electronic control unit (ECU)...
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