The F-35 fleetmission capable rate—the percentage of time the aircraft can perform one of itstasked missions—was about 55 percent in March 2023, far below program goals.This performance was due in part to challenges with depot and organizationalmaintenance (see fig.). The program was behind schedule in establishing depotmaintenance activities to conduct repairs. As a result, component repair timesremained slow with over 10,000 waiting to be repaired—above desired levels. Atthe same time, organizational-level maintenance has been affected by a numberof issues, including a lack of technical data and training.
The Department of Defense (DOD) relies heavily on its contractor to lead andmanage F-35 sustainment (see fig.). However, as DOD seeks expandedgovernment control, it has neither (1) determined the desired mix of governmentand contractor roles, nor (2) identified and obtained the technical data needed tosupport its desired mix. The military services must take over management of F35 sustainment by October 2027 and have an opportunity to make adjustments—specifically to the contractor-managed elements. Reassessing its approach couldhelp DOD address its maintenance challenges and reduce costs.