Airworthiness directives › 2017-12-01
AD 2017-12-01 Airworthiness Directives; The Boeing Company Airplanes
Models named: 767-200 series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to The Boeing Company Model 767-200 series airplanes, equipped with 767-400ER flaps modified as specified in supplemental type certificate (STC) ST01329WI-D.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Except as provided by paragraph (i)(1) of this AD, at the applicable time specified in paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 767-57A0134, dated May 27, 2016: Do a general visual inspection of the 6-9 drive arm assembly on the left and right wing for any damage, and all applicable related investigative and corrective actions, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 767-57A0134, dated May 27, 2016, except as required by paragraph (i)(2) of this AD. Do all applicable related investigative and corrective actions before further flight. Repeat the inspection at the interval specified in paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 767-57A0134, dated May 27, 2016.
Unsafe condition
This AD was prompted by a report indicating that during an inspection associated with a flap, the extend overtravel stops on an actuator crank arm assembly were making contact with an adjacent drive arm assembly when the flaps were retracted. We are issuing this AD to detect and correct interference between a drive arm assembly and an actuator crank arm assembly, which causes a fatigue load on a certain link that could result in failure of that link and subsequent loss of the flap. Continued safe flight and landing could be adversely affected after the departure of a flap during takeoff or landing.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1