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Tue, Jul 01, 2003

AD: Rolls-Royce

AD NUMBER: 2003-13-10

MANUFACTURER: Rolls Royce
SUBJECT: Airworthiness Directive 2003-13-10


SUMMARY: The FAA is adopting a new airworthiness directive (AD) for Rolls-Royce Corporation (formerly Allison Engine Company, Allison Gas Turbine Division, and Detroit Diesel Allison) models 250-C30R/3, -C30R/3M, -C47B, and -C47M turboshaft engines. This AD requires initial and repetitive electrical signal inspections of the hydro-mechanical unit (HMU) Power Lever Angle (PLA) potentiometer. This AD is prompted by an investigation by the National Transportation Safety Board (NTSB), which revealed that a potential undetected failure of the PLA potentiometer electrical signal could cause uncommanded and sudden changes in engine power. The actions specified in this AD are intended to prevent uncommanded and sudden changes in engine power.

FMI: www.avantext.com/DailyADIndex.ASP?AD=20031310

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