F-35 Joint Strike Fighter: Action Needed to Improve Reliability and Prepare for Modernization Efforts
U.S. Government Accountability Office (GAO)
April 29, 2019
DOD plans to spend over $270 billion to buy more than 2,000 F-35 aircraft over the next 26 years.

In this year's review, among other things, GAO found the F-35 program:

-- Made slow, consistent progress on reliability and maintainability.

But it has not met 4 of 8 targets, which suggests the aircraft will be less reliable and more costly to maintain.

-- Will start a modernization effort—now estimated at $10.5 billion—without a complete business case and while still developing key technologies. This increases the risk of cost increases and delays.

We made 5 recommendations, including that the program clarify and improve its reliability plans.

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