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Posted: Wednesday, July 11th, 2012 8:56 AM HST

F-22 pilot in Hawaii briefly has oxygen deficit

By Associated Press

HONOLULU (AP) — The Hawaii Air National Guard says one of its pilots briefly experienced an oxygen deficit while flying an F-22 stealth fighter last week. Hawaii Guard spokesman Lt. Col. Charles Anthony said Tuesday the pilot was heading back to Joint Base Pearl Harbor-Hickam from a routine training sortie when sensors indicated he wasn't getting as much oxygen as he should. The pilot also felt dizzy. He activated the emergency oxygen system until his symptoms abated and the plane's oxygen generating system returned to normal. The pilot landed safely after Friday's incident. A medical exam cleared him for duty. The Air Force has been investigating why F-22 pilots have sometimes suffered oxygen deficits. The problem prompted the Air Force to ground the world's most advanced fighter jet for a while in 2011.