Rolls-Royce (Allison) 250-C30 and -C47 engines
Rolls-Royce (Allison) 250-C30 and -C47 engines -- Conduct initial and repetitive electrical-signal inspections of the hydromechanical unit (HMU) power-lever angle potentiometer. Replace the existing HMU with a new design HMU as a mandatory terminating action to the inspection requirements.
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