ROBINS AIR FROCE BASE, Ga. – Tyler Giddense, 402nd Aircraft Maintenance Support Group Aerospace Ground Equipment Flight power support mechanic, packs a bearing in grease during a preventive maintenance inspection of a portable MC-5 air compressor at Robins Air Force Base, Georgia, Aug. 19, 2021. The bearings are cleaned, inspected for serviceability, and then repacked with new grease during the two-year preventive maintenance inspection. (U.S. Air Force photo by Joseph Mather)