The Air Force resumed flying its T-6 Texan II training aircraft Tuesday after a rash of hypoxia-like scares grounded them for nearly a month.
But while the Air Force is homing in on what led to the physiological problems, the final root cause has not yet been determined.
The 19th Air Force grounded its T-6 fleet Feb. 1 after 13 pilots at three bases experienced “unexplained physiological events” during the last week of January.
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