The Air Force's fiscal year 2022 budget request reflects a re-baselined F-35A retrofit strategy, showing the service expects to eventually upgrade a total of 483 jets in low-rate initial production lots 5-16 to either a Block 4 configuration or a partial retrofit to include Technology Refresh 3 -- up from 457 aircraft in last year's request. The total includes 148 jets in lots 5-10 the service wants to upgrade to a Lot 15 configuration, which will be the first LRIP...
