GAO: Weapon System Sustainment10 Nov 2022 GAO"
F-35A/B/C Lightning II Joint Strike Fighter ...
PROGRAM OFFICE COMMENTS:"In commenting on a draft of this assessment, the program office provided technical comments, which we
incorporated where appropriate. In addition, F-35 program officials stated the following:
• The 28.3 percent increase in the department’s F-35 total operating and support costs from 2019 to 2020 for
was due to increasing fleet size—25.1 percent increase in the number of aircraft—and operations—a 31.3
percent increase in flying hours for the F-35.
• F-35 engine unscheduled maintenance issues have generally been mitigated, and no longer pose the
sustainment risk projected. According to F-35 program officials, engine power module backorders have
been cut by over 50 percent by (1) accelerating depot repair capacity at Oklahoma City Air Logistics
Complex, (2) adding capacity in F-35 partner countries to repair engines, and (3) reducing unscheduled
demands for engine maintenance. Additionally, program officials stated that from June 2021 to June 2022
the rate of not mission capable due to supply associated with the engine decreased 2 percent even as
fleet size grew by 20 percent. According to F-35 program officials, the focus now shifts to ensuring that
there is sufficient capacity to conduct scheduled engine maintenance overhauls. DOD has added capacity
to prepare for overhauls and has identified risks that need to be mitigated to prepare for scheduled depot
repair capacity, according to program officials. Program officials also stated that they are focused on
reducing the costs associated with these scheduled engine maintenance overhauls.
• The health of the supply chain is predicated on the velocity of the repair network. According to program
officials, as of June 2022, 39 of 68 depot repair workloads have been activated at military service depots,
with 13 additional workloads planned to be activated by the end of 2022. According to program officials,
COVID-19 and funding priorities have delayed remaining activations.
Source: https://s3.documentcloud.org/documents/ ... 6217-1.pdf (32Mb)