Airworthiness Directives; The Boeing Company Airplanes

 at regulations.gov under Docket No. FAA-2025-2546. FOR FURTHER INFORMATION CONTACT: Samuel Dorsey, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 206- 231-3415; email: [email protected] . SUPPLEMENTARY INFORMATION: Background The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to supersede AD 2024-19-14, Amendment 39-22856 (89 FR 80077, October 2, 2024) (AD 2024-19-14). AD 2024-19-14 applied to certain The Boeing Company Model 777-200, 777-200LR, 777-300ER, and 777F series airplanes, with General Electric Company (GE) GE90-76B, GE90-85B, GE90-90B, GE90-94B, GE90-110B1, and GE90-115B model turbofan engines installed. The NPRM was published in the Federal Register on September 15, 2025 (90 FR 44340). The NPRM was prompted by a determination that additional inspections are required to address the unsafe condition. In the NPRM, the FAA proposed to require repetitive DETs, repetitive bond resistance measurement, and applicable on- condition actions. The NPRM also proposed to expand the applicability and require revising the existing maintenance or inspection program, as applicable, to incorporate a certain airworthiness limitation. The FAA is issuing this AD to address such latent failures. A lightning strike to an engine nacelle combined with latent failures of the lightning protection features for the engine fuel feed s