Persistent issues with engine production and lack of spare parts have hindered availability.
The cost of the F-35A model has decreased to roughly , a strong value for its advanced capabilities. The Bad: Sustainment and Quality Issues Skyrocketing Sustainment Costs: Projected to reach trillion by 2023, a increase over 2018 projections. Dod (35) mp4
Some measures of reliability have shown stagnation or even reversal. Persistent issues with engine production and lack of
Pentagon reports have criticized the F-35 Joint Program Office (JPO) for weak oversight of Lockheed Martin. Dod (35) mp4