On Friday, US officials said the F-35 Lightning II test flights had been suspended until an in-depth evaluation was carried out.
The suspension includes the F-35A, the Marines’ F-35B, and the Navy’s F-35C variants of the aircraft.
The cracked engine blade was found on an F-35A at Edwards Air Force Base in California.
The manufacturing of the F-35 aircraft, which is the United States’ most expensive weapons program, costs about 400 billion dollars.
Earlier this month the Pentagon cleared the F-35B jump-jet variant, designed for the US Marines, to resume tests after being suspended for a month.
Reports say both suspensions were a result of engine problems.
The suspension is important because it also comes at a time when the weapons program, to replace Air Force F-16 and Navy F/A-18, is facing scrutiny from US lawmakers and senior defense officials.
The Pentagon says that the plane with the cracked blade is being shipped to a Pratt & Whitney facility in Connecticut for further investigation.
Meanwhile, watch-dog group the Project on Government Oversight has criticized the costly warplane over its “gigantically disappointing performance.”
“That performance would be unacceptable even if the aircraft met its far-too-modest requirements, but it is not,” the group stated.
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Source Article from http://www.presstv.ir/detail/2013/02/23/290401/pentagon-grounds-all-f35-warplanes/
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