US restricts F-22 flights over fault

Pentagon officials announced on Tuesday that the restrictions would require all F-22 flights to stay within close proximity of airbases due to an ongoing and potentially deadly problem with the aircraft’s oxygen gear that deprives pilots of oxygen within the cockpit.

The long-distance air patrol missions conducted out of Alaska by the F-22 jet fighters, however, will cease altogether and will instead be carried out by older F-15 and F-16 fighters, an Air Force spokesman announced.

According to local media reports, pilots of the $420-million fighter jets have reported at least 26 cases of experiencing “hypoxia-like symptoms” while flying the aircraft in the past four years. Hypoxia is reportedly caused by a lack of oxygen to the brain which leads to dizziness, confusion and disorientation.

For years, Air Force officials have tried to find the source of the fault with oxygen system that has troubled the F-22, described as the most advanced fighter jet, since it went into service in December 2005.

The aircraft was grounded last May after 11 of such incidents were reported. However, the aircraft resumed the flights again in September after Air Force officials deemed it safe. Since then, there have been 11 more reported cases of hypoxia symptoms in pilots, as well as 5 cases in maintenance crews.

Panetta has also ordered the Air Force to speed up the installation of a backup oxygen system in the F-22.

Despite a number of probes into the plane’s oxygen system and a grounding of the entire $79 billion fleet for some five months last year, the Air Force has not been able to determine the source of the problem.

MFB/MA

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