The FAA has issued a new airworthiness directive targeting GE Aerospace GEnx engines after investigators discovered a fuel pump issue that could lead to internal fuel leaks and increase the risk of an engine fire.
The mandate mainly affects Boeing 787 Dreamliners powered by GEnx-1B engines, forcing airlines to carry out inspections and possible component replacements within the required compliance period.
Among major U.S. carriers, United Airlines is expected to face the largest impact, with roughly 100 Boeing 787 aircraft potentially requiring inspections. American Airlines could see around 60 Dreamliners affected by the directive.
Delta Air Lines, however, will see minimal impact because its primary long-haul fleet relies on Airbus A350 aircraft powered by Rolls-Royce Trent engines rather than GE GEnx engines.
The FAA said the problem involves improperly secured fuel pump components that could loosen over time, potentially allowing fuel to leak into areas exposed to ignition sources.
While no major accident has been directly linked to the defect so far, regulators determined the risk was serious enough to require mandatory inspections across affected fleets. Airlines are expected to complete the required checks during scheduled maintenance in order to avoid major operational disruptions.