Airworthiness Directive · Amendment 39-18726 · Flight controls
The Boeing Company Airplanes
Superseded. A later AD replaced this one: AD 2020-20-09. Comply with the one in force.
This AD applies to all The Boeing Company Model 787-8 and 787-9 airplanes, certificated in any category.
We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 787-8 and 787-9 airplanes. This AD requires repetitive cycling of either the airplane electrical power or the power to the three flight control modules (FCMs). This AD was prompted by a report indicating that all three FCMs might simultaneously reset if continuously powered on for 22 days. We are issuing this AD to address the unsafe condition on these products.
Within 7 days after the effective date of this AD, do the action specified in paragraph (g)(1) or (g)(2) of this AD. Repeat the action specified in paragraph (g)(1) or (g)(2) of this AD thereafter at intervals not to exceed 21 days.
(1) Cycle the airplane electrical power, in accordance with “Option 1” of the Accomplishment Instructions of Boeing Alert Service Bulletin B787-81205-SB270040-00, Issue 001, dated November 25, 2016.
(2) Cycle power to the left, center, and right FCMs, in accordance with “Option 2” of the Accomplishment Instructions of Boeing Alert Service Bulletin B787-81205-SB270040-00, Issue 001, dated November 25, 2016.
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
