EASA AD US-2018-07-19
Landing Gear - Pitch Trim Module - Inspection and Replacement
Summary
Federal Aviation Administration Airworthiness Directive 2018-07-19 is a final rule addressing all Boeing Model 787-8 and 787-9 airplanes. It requires inspection and replacement of the parking brake and alternate pitch trim module (PBM) to prevent unintended disengagement. The directive mandates a PBM installation test following replacement to ensure safety.
What Changed
This new airworthiness directive introduces mandatory replacement of PBM part numbers 4260-0037-3 and -4 with part number 4260-0037-5 and requires performing a PBM installation test. It clarifies compliance requirements and revises language in the service bulletin to allow referencing the airplane maintenance manual rather than strict adherence. The directive applies to all Boeing 787-8 and 787-9 airplanes regardless of original certificate issuance date.
Why It Matters
This directive addresses a critical safety issue where the parking brake and pitch trim module may unintentionally disengage, posing risks of damage to the airplane and hazards on the ground. Operators, maintenance, and compliance teams must ensure affected PBMs are replaced and tested to maintain airworthiness and regulatory compliance. Failure to comply could lead to unsafe conditions and regulatory penalties.
What To Do
Operators of Boeing 787-8 and 787-9 airplanes must inspect the PBM and replace any units with part numbers 4260-0037-3 or -4 with part number 4260-0037-5 within 60 months of May 21, 2018. After replacement, a PBM installation test must be performed, and any corrective actions required by the test must be completed before further flight. Service information from Boeing Service Bulletin B787-81205-SB320028-00, Issue 001, dated October 31, 2016, should be used as guidance.
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