Tech. Sgt. Jacob Delloroso, left, 307th Aerospace Ground Equipment craftsman, and Airman 1st Class Toni Petty, 307th AGE journeyman, use a jack to lift a fuel tank on Barksdale Air Force Base, La., Dec. 3, 2013. Delloroso and Petty removed and replaced the fuel sending unit on a self-generating nitrogen cart. The fuel sending unit sends a signal to the fuel gauge showing the fuel levels for the SGNC. (U.S. Air Force photo/Senior Airman Joseph A. Pagán Jr.)
A fuel sending unit and float rest on a self-generating nitrogen cart at Barksdale Air Force Base, La., Dec. 3, 2013. The float moves up and down when the fuel levels change, sending a signal to the fuel gauge signifying the level of fuel in the tank. (U.S. Air Force photo/Senior Airman Joseph A. Pagán Jr.)
Airman 1st Class Toni Petty, 307th Aerospace Ground Equipment journeyman, turns on a self-generating nitrogen cart on Barksdale Air Force Base, La., Dec. 3, 2013. Petty fixed a leak on a float inside the fuel tank of the SGNC. The float was filled with fuel, sinking it to the bottom of the tank, which kept the fuel gauge at empty. (U.S. Air Force photo/Senior Airman Joseph A. Pagán Jr.)
Airman 1st Class Toni Petty, 307th Aerospace Ground Equipment journeyman, mounts a gas line on a self-generating nitrogen cart on Barksdale Air Force Base, La., Dec. 3, 2013. A SGNC is used to turn air into nitrogen so it can be used to fill the tires on a B-52H Stratofortress. Air pressure in a tire changes with the weather, and nitrogen helps sustain the correct pounds per square inch. (U.S. Air Force photo/Senior Airman Joseph A. Pagán Jr.)
Airman 1st Class Toni Petty, 307th Aerospace Ground Equipment journeyman, mounts a gas line on a self-generating nitrogen cart on Barksdale Air Force Base, La., Dec. 3, 2013. Petty removed the gas line to perform maintenance on the fuel tank and determine why the fuel gauge wasn't reading properly. (U.S. Air Force photo/Senior Airman Joseph A. Pagán Jr.)