SNAPSHOT: WHAT WE DO Published July 9, 2009 By Tech. Sgt. Carolyn Erfe 4th Combat Camera MARCH AIR RESERVE BASE, CALIF. -- U.S. Air Force Staff Sgt. Shane Olguin, with the 452nd Maintenance Squadron's Aircraft Pneudraulics Systems Shop, checks the fluid flow on an AV843 hydraulic stand during inspection at March Air Reserve Base, Calif. The stand is used for bench checking hydraulic and pneumatic components. (U.S. Air Force photo by Tech. Sgt. Carolyn Erfe)