Airworthiness Directive · Amendment 39-22856 · Fuel
The Boeing Company Airplanes
Superseded. A later AD replaced this one: AD 2026-15-02. Comply with the one in force.
This AD applies to The Boeing Company Model 777-200, 777-200LR, 777-300ER, and 777F series airplanes, certificated in any category, with General Electric Company (GE) GE90-76B, GE90-85B, GE90-90B, GE90-94B, GE90-110B1, and GE90-115B model turbofan engines installed.
The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777-200, 777-200LR, 777-300ER, and 777F series airplanes. This AD was prompted by a report of potential latent failures of the lightning protection features for the engine fuel feed system. This AD requires repetitive inspections and bond resistance measurement of the bonding jumpers on the first fuel feed tube installed immediately forward of the wing front spar at each of the two engine locations, and applicable corrective actions. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified by paragraph (h) of this AD: Within 90 days after the effective date of this AD, or within 1 year after the date of issuance of the original airworthiness certificate or original export certificate of airworthiness, whichever comes later, do detailed inspections and measure the bond resistance of the bonding jumpers on the fuel feed tube installed immediately forward of the wing front spar at each of the two engine locations, and do all applicable corrective actions, in accordance with the Part 2 of the Work Instructions of Boeing Multi Operator Message MOM-MOM-24-0463-01B, dated September 4, 2024. All applicable corrective actions must be done before further flight. Repeat the inspections and bonding resistance measurement thereafter at intervals not to exceed 1 year.
(1) Where Boeing Multi Operator Message MOM-MOM-24-0463-01B, dated September 4, 2024, specifies contacting Boeing for instructions if a bonding resistance measurement continues to exceed specified limits after multiple failed corrective action attempts, this AD requires doing a repair before further flight using a method approved in accordance with the procedures specified in paragraph (i) of this AD.
(2) Boeing Multi Operator Message MOM-MOM-24-0463-01B, dated September 4, 2024, refers to Aircraft Illustrated Parts Catalogue (AIPC) AIPC 28-11-51-01 in several places; however, the correct AIPC reference is AIPC 28-11-51-02.
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.
