US F-16 maintenance commander fired at South Korean base Rachel Cohen October 21, 2022, 6:45 AM Col. Jay Bertsch, commander of the 8th Maintenance Group at Kunsan Air Base, South Korea, was fired Oct. 11 due to a “loss of confidence” in his leadership, Air Force Times has learned. Bertsch was reassigned outside of the unit after four months in the job, 8th Fighter Wing spokesperson Capt. K. Paig..