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Mon, Nov 29, 2004

AD: Rolls Royce

AD NUMBER: 2004-24-04
MANUFACTURER: Rolls Royce
SUBJECT: Airworthiness Directive 2004-24-04


SUMMARY: The FAA is superseding an existing airworthiness directive (AD) for RRC models 250-C30R/3, -C30R/3M, -C47B, and -C47M turboshaft engines. That AD currently requires initial and repetitive electrical signal inspections of the hydromechanical unit (HMU) Power Lever Angle (PLA) potentiometer. This ad continues to require those inspections and adds replacement of the existing HMU with a new design HMU as a mandatory terminating action to the repetitive inspection requirements. This AD results from the manufacturer releasing a redesigned HMU that has a dual-element potentiometer. We are issuing this AD to prevent uncommanded and sudden changes in engine power.

FMI: www.avantext.com/DailyADIndex.ASP?AD=20042404

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