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Dozens of F-35 fighter jets grounded in US due to oxygen deprivation

US air force nullifies winging from Arizona base after captains suffer symptoms resembling hypoxia a shortage of oxygen to the brain

About a one-quarter of the F-3 5 fighter jets made by Lockheed Martin have stopped winging until farther notification because of irregularities in captains oxygen supplyings, the US air force has announced.

Training flights at Arizonas Luke air force base, where the 55 jet-blacks are based, have been floored indefinitely. There are more than 220 F-3 5s piloting worldwide.

Luke air force base, situated north-west of Phoenix, is home to the 56 th Fighter Wing. The base cancelled local winging procedures for its F-3 5A Lightning II aircraft due to five incidents in which aviators experienced symptoms resembling hypoxia, or oxygen deprivation, spokesman Captain Mark Graff said on Friday at the Pentagon.

The air force said the accident resulted from 2 May to Thursday and in each case the aircrafts backup oxygen structure ran as designed, with the jets were able to land safely. The footings F-3 5A Lightning IIs typically winged 25 qualify missions each weekday, base officials said.

The grounding was widened so the air force could study the issue with captains, maintenance workers and medical professionals, announced Major Rebecca Heyse, a base spokeswoman.

The grounding sees at a critical time for Lockheed, which plans to demonstrate the advanced airplane at the Paris Air Show next week. F-3 5 air operations at other footings continued, US air force officials told.

The F-3 5 business reports for about 37% of Lockheeds income. During the first one-quarter, Lockheeds revenue from its aeronautics business increased 8% to $4.11 bn, led by higher sale of the F-3 5.

Luke is the largest F-3 5 base in “the worlds” and instructs US pilots as well as those of allied countries.

A Lockheed representative said the company would help the us air force address the issue. Lockheed and its main partners, Northrop Grumman, Pratt and Whitney and BAE Systems have been developing and building F-3 5s for the US military and 10 allies.

The 220 F-3 5s around the world have collectively done more than 95,000 flight hours, though the plane has not been able to assured combat.

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