by Cora Currier, ProPublica
The pricey F-22 Raptor jet has just gotten back up in the air, but the safety problem that grounded it doesn’t seem to be resolved.
Last year, the F-22 was grounded for four months because pilots were experiencing dizziness and other symptoms of hypoxia, which is caused by a lack of oxygen. The Air Force looked into possible malfunctions in the plane’s oxygen-generation system, but in September, the planes were cleared for service after technicians were unable to pinpoint a source of the problem.
Yesterday, however, the Air Force’s Air Combat Command confirmed that some pilots — they would specify only “a very small” number — have requested not to fly the F-22.