EASA AD US-2020-02-12
Flight Controls - Electro-Mechanical Actuators - Replacement
Summary
Airworthiness Directive 2020-02-12 is a final rule issued by the FAA addressing The Boeing Company Model 787 series airplanes. It mandates the replacement of certain electromechanical actuators (EMAs) on flight controls due to wire harness chafing that could cause wire damage and potential fire hazards. This directive expands previous requirements to include all Model 787 airplanes and adds a new requirement to identify EMA part numbers for replacement if affected.
What Changed
This AD supersedes AD 2017-15-04 by expanding its applicability from only Model 787-8 and 787-9 airplanes to all Model 787 series airplanes. It retains the original EMA replacement requirements and adds a new step to identify EMA part numbers on certain airplanes to ensure affected EMAs are replaced. The change addresses the risk of discrepant EMAs being installed on airplanes outside the original scope.
Why It Matters
This AD is critical for aviation professionals as it prevents potential electrical wire damage caused by chafing in EMAs, which could lead to ignition sources in flammable zones and result in fire or explosion. Operators, maintenance, and compliance teams must ensure affected parts are identified and replaced to maintain airworthiness and safety. The expanded applicability ensures all Model 787 operators are aware of the risk, even if discrepant parts are installed during maintenance or part rotation.
What To Do
Operators of all Boeing 787 series airplanes must inspect and identify EMA part numbers as specified and replace any affected EMAs in accordance with Boeing Service Bulletin B787-81205-SB270030-00. Compliance with the AD is mandatory by March 12, 2020, the effective date of this directive. Maintenance teams should follow the procedures outlined in the service bulletins and maintain records of compliance.
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