Helo lifts 57 air conditioning units to roof of Oklahoma City Air Logistics Complex main production facility
A Sikorsky S-58T heavy-lift helicopter from Aircrane Incorporated lifts a large heating unit May 27, 2018, Tinker Air Force Base, Oklahoma. The S-58T lifted 57 heating units to the roof of building 3001 as part of on-going energy efficiency improvements made across the base. (U.S. Air Force photo/Greg L. Davis)