What was found
FA REPORTS L1 DOOR HANGS UP AND MAKES A GROANING NOISE DURING OPENING AND CLOSING. GROUNDED - YES. INSPECTED DOOR, SOUND APPEARS TO BE ORIGINATING FROM TOP HINGE, NO OTHER DEFECTS NOTED. LUBRICATED UPPER HINGE, ROLLERS AND TRACKS, NOISE MINIMIZED, ONLY NOTABLE ON CLOSURE FROM THE INSIDE INTERMITTENTLY.DOOR OPERATION NORMAL, OK FOR SERVICE.REF AMM 52-11-00 FOR OPS CHECK INSPECTION REF AMM 12-25-11.