54th Helicopter Enlisted Aircrew Published March 6, 2014 By Senior Airman Andrew Crawford Minot Air Force Base Public Affairs MINOT AIR FORCE BASE, N.D. -- Tech. Sgt. Tim McKinley, 54th Helicopter Squadron flight engineer, works long hours to provide service to the flightcrews that patrol the skies of Minot Air Force Base, N.D., Feb. 21, 2014. McKinley, along with other flight engineers, provide regular checks and data to the flight crew before takeoff and during flight.