150714-N-XX566-029 NAVAL AIR STATION NORTH ISLAND, Calif. - Aviation Structural Mechanic 1st Class Jason Knopes, from Goldendale, Wash., and Aviation Structural Mechanic 2nd Class Christopher Jimenez, from San Juan, Puerto Rico, replace a tire for an aircraft fire fighting trainer aboard USS John C. Stennis. The crew is currently preparing for the Navy's Board of Inspection and Survey.