230213-N-DG679-002
JACKSONVILLE, Fla. (Feb. 13, 2023) Sheet metal apprentice Evan Durflinger, assigned to Fleet Readiness Center Southeast’s F-5 Production Line, works to replace the upper canopy longeron (UCL) on an F-5N Tiger II. UCLs are the main structural components of the airframe, providing rigidity to the aircraft around the cockpit. (U.S. Navy Photo by Toiete Jackson/Release)