踏血寻梅结果:Stop flying F-22 Raptor tenses US Air Force -...

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Stop flying F-22 Raptor tenses US Air Force

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2011-5-10 09:45


The U.S. Air Force is no longer flying its entire fleet of F-22 Raptors because of concerns about the system that delivers oxygen to pilots aboard the stealth fighter jets, a military spokeswoman said Friday.


Gen. William Fraser, the head of Air Combat Command at Langley Air Force Base in Virginia, issued the directive earlier this week, said Master Sgt. Pamela Anderson with the Command's public affairs office.


The fleet of 158 fighter jets is on stand-down because of "hypoxia-like" events reported by some of pilots, she said. Hypoxia is when the body receives too little oxygen.


Last November, an F-22 pilot was killed in Alaska when he lost control of his jet during a training exercise. Since January, the Raptor fleet has been restricted from flying above 25,000 feet because of concerns with the plane's oxygen supply system.

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2011-5-10 09:47

Anderson said the cause of the Alaska crash has not been determined and cautioned against linking the crash to Fraser's stand-down order. However, Anderson said pilots reporting what she described as "physiological events" similar to hypoxia was the reason for the general's order not to fly F-22s.


Unlike a grounding of the fleet, the stand-down is considered precautionary and voluntary. But it would be followed at the handful of bases around the country that have F-22s, including Elmendorf Air Force Base in Anchorage and Holloman Air Force Base in New Mexico, Anderson said.


"The safety of our airmen is paramount, and we will take the necessary time to ensure we perform a thorough investigation," she said in a prepared response.


Anderson said she did not know how long the stand-down would last. There was a contingency plan in place but could not immediately provide details, she said.


Capt. Jeffrey Haney was killed last November when his F-22 crashed 100 miles north of Anchorage. Haney was on a training run with another F-22 to practice "intercepts" when his plane disappeared from ground radar tracking and from communications with the other stealth fighter. The married father of two from Clarklake, Mich., never ejected from the plane.


The F-22 Raptor was introduced in 2005, but it is unclear if the costly fighter jet made by Lockheed-Martin has ever seen combat.

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2011-5-10 09:47

In March, Gen. Norton Schwartz, the Air Force chief of staff, told lawmakers that he expected the F-22 Raptor to play a prominent role in attacks on Moammar Gadhafi forces in Libya. With its stealth design, the F-22 can evade radar and has advanced engines that allow it to fly at faster-than-sound speeds without using afterburners.


During defense spending discussions in Congress last summer, Defense Secretary Robert Gates was willing to cut the F-22 fighter jet program as too costly. When a spending bill was passed, there was no money in it for more F-22s and production was capped.



AP/Defense News
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