
Pentagon acquisition czar Frank Kendall and F-35 boss Air Force Lt. Gen. Christopher Bogdan Monday cited an “extensive rub” of a third stage fan blade as a key factor in a F-35 runway fire that lead to the Air Force’s initial grounding June 23, according to F135 engine manufacturer Pratt & Whitney. Pratt & Whitney spokesman Matthew Bates said Monday Bogdan and Kendall also confirmed that the company has inspected all other engines in the fleet, but only the incident…