TM 9-2320-209-20-3-1 b. Replacement. WARNING Retaining springs (1) may snap out and cause injury. Cover spring with free hand when snapping it in place. 1. Put sealed beam (1) into light door (2), alining tab (3) on sealed beam with slot (4) on door. 2. Put in three evenly spaced retaining springs (5) by holding bend of spring over sealed beam and pressing free ends inside flange of light door (2). GO TO FRAME 2 7-115