What was found
(CAN) ON DAILY WALK AROUND INSPECTION OF ACFT, THE LT HAND OUT BOARD FLAP WAS FOUND TO HAVE SIDE PLAY. ON CLOSER VISUAL INSPECTION THE AFT BEARING FACES ON BOTH TRACKS, IT WAS FOUND TO HAVE WORN THE RIB FACE OF THE FLAP. MEASURE OF THE WEAR FOUND TO BE .020 MATERIAL MISSING FROM RIB. FLAP WAS REPAIRED WITH NEW RIBS & FLAP RE-INSTALLED. ACFT RETURNED TO SERVICE WITHOUT ISSUE.