Airworthiness Directives; The Boeing Company Airplanes
Key claim: The FAA is superseding AD 2024-19-14 to require additional repetitive detailed inspections and bond-resistance measurements, expand applicability, and add an airworthiness limitation for bonding jumpers on Boeing 777 main fuel tank penetrations.
Abstract
(Rule · Transportation Department, Federal Aviation Administration) The FAA is superseding Airworthiness Directive (AD) 2024-19- 14, which applied to certain The Boeing Company Model 777-200, 777- 200LR, 777-300ER, and 777F series airplanes. AD 2024-19-14 required 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 the left and right main fuel tank penetrations and applicable corrective actions. This AD was prompted by a determination that additional inspections are required to address the unsafe condition. This AD requires repetitive detailed inspections (DETs), repetitive bond resistance measurement, and applicable on- condition actions. This AD also expands the applicability and requires revising the existing maintenance or inspection program, as applicable, to incorporate a certain airworthiness limitation. The FAA is issuing this AD to address the unsafe condition on these products.
Why this matters
Bonding jumpers on fuel tank penetrations provide the electrical continuity needed to prevent ignition sources inside fuel tanks, a longstanding FAA safety focus after TWA 800. Expanding the inspection regime and adding a formal airworthiness limitation on the 777 tightens the recurring maintenance burden for operators and reflects continued iteration on fuel-tank ignition prevention rules.