Air Force grounds F-22s over oxygen system concerns.

The U.S. Air Force has grounded its entire F-22 Raptor…

The U.S. Air Force has grounded its entire F-22 Raptor fleet amidst continuing concern over how the fighter jet provides oxygen to the pilot, according Capt. Jennifer Faerrau, a spokesperson for the Air Force’s Air Combat Command.

The stand-down order was made Tuesday but is just now becoming public. It’s unclear how long the stand down will last.

There are about 165 Raptors in the fleet. Since January, the aircraft already had been kept at altitudes under 25,000 feet during an ongoing investigation into a November crash. Flying above that altitude could cause a pilot to black out from lack of oxygen and lose control.

The stand-down affects all routine training and other missions, Faerrau said.

Source: CNN

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