The F-35 Joint Program Office projects it will cost $643 million to upgrade 54 F-35C Joint Strike Fighters to Block 3F software between April 2016 and January 2020, among other modifications. The F-35Cs, which are the Navy's carrier variant, are being inducted into the JPO's structural life limited parts (SLLP) modification and upgrade process, according to a report sent to Congress in July about the service's strike fighter inventory shortfall. The 54 Joint Strike Fighters being modified will include aircraft...
