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Thu, Jan 02, 2020

AD: The Boeing Company Airplanes

AD NUMBER: 2019-24-18

PRODUCT: Certain Boeing Model 727 airplanes, Model 757 airplanes, and Model 767-200, -300, -300F, and -400ER series airplanes.

ACTION: Final rule

SUMMARY: This AD was prompted by reports of nuisance stick shaker activation while the airplane accelerated to cruise speed at the top of climb.

This AD was also prompted by an investigation of those reports that revealed that the angle of attack (AOA) (also known as angle of airflow) sensor vanes could not prevent the build-up of ice, causing the AOA sensor vanes to become immobilized, which resulted in nuisance stick shaker activation.

This AD requires a general visual inspection of the AOA sensors for certain AOA sensors, and replacement of affected AOA sensors.

DATES: This AD is effective February 3, 2020.

COST: The FAA estimates that this AD affects 1,287 airplanes of U.S. registry. Operators may incur the following costs in order to comply with this AD:

  • Inspection - 1 work-hour × $85 per hour = $85

Replacement:

  • Labor - Up to 3 work-hours × $85 per hour = Up to $255.
  • Parts - Up to $54,000.
  • Cost per Airplane - Up to $54,255.
FMI: AD

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