
The U.S. Air Force is investigating whether maintenance problems with the T-6A’s pilot breathing system caused a recent surge in physiological episodes (PEs) that led to the grounding of the trainer aircraft fleet, according to a service official.The Air Force suspects that technicians may need more training to maintain the plane's on-board oxygen generation system (OBOGS), said Lt. Gen. Mark Nowland, deputy chief of staff for operations, who testified before the House Armed Services Committee’s tactical air and land forces…