Airworthiness Directive · Amendment 39-19648 · Fuselage
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 777-200, -200LR, -300, -300ER, and 777F series airplanes, certificated in any category, as identified in Boeing Alert Service Bulletin 777-53A0081, Revision 2, dated March 29, 2019.
The FAA is superseding Airworthiness Directive (AD) 2017-16- 10, which applied to all The Boeing Company Model 777 airplanes. AD 2017-16-10 required repetitive inspections of the left and right side underwing longerons for any crack, and related investigative and corrective actions if necessary. This AD retains the requirements of AD 2017-16-10, reduces certain compliance times for certain airplanes, and removes airplanes from the applicability. This AD was prompted by reports of cracks on the underwing longerons. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified in paragraph (h) of this AD: At the applicable times specified in paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 777-53A0081, Revision 2, dated March 29, 2019, do all applicable actions identified as “RC” (required for compliance) in, and in accordance with, the Accomplishment Instructions of Boeing Alert Service Bulletin 777-53A0081, Revision 2, dated March 29, 2019. Replacing an underwing longeron, including doing all applicable on-condition actions, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 777-53A0081, Revision 2, dated March 29, 2019, except as required by paragraph (h)(2) of this AD, terminates the repetitive inspections specified in tables 1 through 6 and table 15 of paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 777-53A0081, Revision 2, dated March 29, 2019, for that longeron only.
(1) For purposes of determining compliance with the requirements of this AD: Where Boeing Alert Service Bulletin 777-53A0081, Revision 2, dated March 29, 2019, uses the phrase “the Revision 2 date of this service bulletin,” this AD requires using “the effective date of this AD.”
(2) Where Boeing Alert Service Bulletin 777-53A0081, Revision 2, dated March 29, 2019, specifies contacting Boeing for repair instructions: This AD requires doing the repair using a method approved in accordance with the procedures specified in paragraph (j) of this AD.
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
