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Fri, Nov 21, 2014

AD: Boeing Company

AD NUMBER: 2014-23-04

PRODUCT: Certain The Boeing Company Model 777-200LR, -300, -300ER, and 777F series airplanes.

ACTION: Final Rule

SUMMARY: This AD was prompted by reports of dual pitch rate sensor (PRS) failures causing the primary flight computers to transition from primary mode to secondary mode, resulting in autopilot disconnects. This AD requires an inspection to determine the PRS part number, and replacement if necessary.

The FAA is issuing this AD to prevent a dual PRS failure that could cause an automatic disengagement of the autopilot and autoland, which may prevent continued safe flight and landing if disengagement occurs at low altitude and the flight crew is unable to safely assume control and execute a go-around or manual landing.

DATES: This AD is effective December 26, 2014.

FMI: AD

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