Staff Sgt. Heather Best and Staff Sgt. Michael Treasure of the 128th Air Refueling Wing propulsion section, complete engine maintenance on a KC-135R Stratotanker here Feb. 7, 2016. An acceptance inspection incorporates the many capabilities of the 128 ARW Maintenance Group and takes approximately two weeks to complete before final approval to return to flight. (U.S. Air Force photo by Tech. Sgt. Meghan Skrepenski/Released)