The months-long grounding is over:
On September 21st, the U.S. Air Force will allow its F-22 fighters to fly again. The aircraft had been grounded for 140 days because of problems with the pilot’s oxygen system. The air force is not giving out many details on exactly what the problems is, although they say a report on the F-22 oxygen system will be out by the end of the year. Each F-22 will undergo a detailed inspection before it is cleared to fly. This may have something to do with earlier remarks about toxins somehow getting into the pilot’s air supply. The problem was always about something bad in the air supply. This has kept all 168 F-22s grounded since May. The only exception was a squadron based on the Virginia coast, that was given permission to fly out of the way of hurricane Karina. Those F-22s encountered no problems with their air supply.
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During the grounding, pilots and ground crews used simulators and (for the ground crews) maintenance exercises on the grounded aircraft to keep their skills sharp. In addition, everyone helped checking out a growing list of aircraft components in support of the search for the breathing problem). The air force was also under time pressure to fix the problem. That’s because after 210 days on the ground, aircrew have to undergo extensive retraining to regain combat flying status. This added a little more urgency to fixing the problem quickly. The grounding also left a dozen F-22s stranded at a training base, where they were for live weapons exercises. At least six new F-22s could not be delivered because of the grounding.
