Airman at Work: Routine maintenance keeps aircraft safe Published May 18, 2015 By Senior Airman Rachel Kocin 910th Airlift Wing Public Affairs YOUNGSTOWN AIR RESERVE STATION, Ohio -- Air Force Reserve Senior Airman Matt Tyrell, 910th Maintenance Squadron crew chief, removes a panel to check oil levels in the propeller of a C-130H Hercules aircraft here, May 3, 2015. This is one of many inspections to make sure the aircraft is fully mission capable. (U.S. Air Force photo/Senior Airman Rachel Kocin)