What was found
AIRCRAFT WAS GROUNDED: DAMAGE WAS FOUND BY FASTENER HOLE ELONGATION AT FITTING LOCATION, AT MOUNTING PLATES LOCATED ON BOTTOM OF SKIN OF WING/PYLON AREA BETWEEN RIBS 7 AND 8, #1 ENGINE PYLON, LEFT WING. REPAIRED MOUNTING PLATE PER AARD 57-21-11-1.