One pilot lost the instrument in low clouds, and given the speed and
low altitude, hit the ground.
Congress immediately passed a law holding manufacturers
responsible for defects, even if they were not authorized to fix
the problem[s].
It was on some doc channel about 10 years ago.
The last problem with F-22 that I heard about was the
software glitch that occurred when "passing" the International
Date Line.
...this area seems to have a history, a nasty one...