On Aviation Week -
F-35 Parts Shortage Threatens To Hold Up Pilot Training
Snip:-
Compounding the problem, the GAO found that the F-35 enterprise does not have enough capacity to repair components “in a timely manner,” because the establishment of repair capabilities at the military depots is six years behind schedule. These capabilities were planned to be completed by 2016, but some capabilities have now been delayed until 2022, according to the watchdog.