Earlier this month, I linked to an article about the F-22 oxygen problems. According to Strategy Page, the problem still has not been resolved:
The U.S. Air Force is making some progress in finding out what is wrong with their F-22s. It appears that some toxins are somehow getting into the pilot’s air supply. This has kept all 168 F-22s grounded for three months, so far. Despite the new findings, the air force still has not nailed down the exact cause of the problem, much less fixed it. The U.S. Navy had a similar problem with its F-18s (there were 64 incidents between 2002-9, resulting in two dead pilots). The navy found that the problem was carbon monoxide getting sucked into the aircraft air system (which the navy modified, eliminating the problem). The air force is looking into the navy experience with these similar problems, to see if there is anything similar going on with the F-22s.
