Airworthiness Directive · Amendment 39-18653 · Equipment/furnishings
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 787-8 airplanes, certificated in any category, as identified in Boeing Alert Service Bulletin B787-81205-SB250054-00, Issue 001, dated December 19, 2014.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 787-8 airplanes. This AD was prompted by a report of uncommanded movement by a captain's seat during a landing rollout due to a failure in the seat horizontal actuator. This AD requires repetitive tests of the captain and first officer seat assemblies for proper operation, and corrective action if necessary. This AD also requires installation of new captain and first officer seat assemblies, which terminates the repetitive tests. We are issuing this AD to prevent a seat actuator clutch failure, which could result in a loss of seat locking and uncommanded motion of the captain's or first officer's seat; uncommanded seat movement could result in reduced controllability of the airplane.
Within 1,000 flight hours after the effective date of this AD, test the operation of the captain and first officer seat assemblies and do all applicable corrective actions, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin B787-81205-SB250054-00, Issue 001, dated December 19, 2014. Do all applicable corrective actions before further flight. Repeat the operational test thereafter at intervals not to exceed 1,000 flight hours until the installation required by paragraph (h) of this AD is done.
Within 72 months after the effective date of this AD, do the actions specified in paragraphs (h)(1) and (h)(2) of this AD. Installing the seat specified in paragraph (h)(1) or (h)(2) of this AD, as applicable, is terminating action for the repetitive operational tests required by paragraph (g) of this AD for that seat only.
(1) Install a new captain seat assembly, in accordance with paragraph 2.F., “Part 3: Terminating Action: Captain Seat Assembly Replacement,” of the Accomplishment Instructions of Boeing Alert Service Bulletin B787-81205-SB250054-00, Issue 001, dated December 19, 2014.
(2) Install a new first officer seat assembly, in accordance with paragraph 2.I., “Part 6: Terminating Action: First Officer Seat Assembly Replacement,” of the Accomplishment Instructions of Boeing Alert Service Bulletin B787-81205-SB250054-00, Issue 001, dated December 19, 2014.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
