F-22 Fleet Is Still Grounded

F-22 stand down continues

Lockheed Sits On Undelivered F-22s as Stand Down Drags On -- Daily Tech

Lockheed has four F-22s that have been accepted by the USAF, but can't be delivered

The F-22 fighter is the premiere air superiority fighter in the Air Force arsenal. The aircraft has been on stand-down status after the USAF ordered an investigation into the possibility that there is an issue with the aircraft's on-boards oxygen generation system. Deliveries of the remaining F-22 aircraft that were ordered are now at a halt and no new aircraft can be flight-tested.

Lockheed Martin continues to build the aircraft and the stores them in "near flight ready" status and minus their all-important radar absorbent coatings. The aircraft have to undergo a certain number of test flights only clad in primer before the stealth coatings can be applied.

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Update: AF: No word when F-22s could fly again -- DoD Buzz

My Comment: More background information on the grounding of the F-22 fleet can be found here and here.