The US Air Force's (USAF's) search for a root cause of hypoxia-like physiological events occurred on T-6 Texan II turboprop trainer and light-attack aircraft still continues. In a statement dated 3 April, USAF said another inspection will be initiated at Edwards Air Force Base. During the tests, the T-6 aircrew breathing system will be characterized through all phases of flight. Testing will start in early April and conclude by mid-May 2018. Two T-6 aircraft, one with a physiological event history and one without, will support this test. 

As part of proactive lifecycle management, the Air Force has an ongoing program to replace the existing On-Board Oxygen Generating System (OBOGS) concentrator with fielding starting in fiscal year 2018 and ending in fiscal 2021.