What was found
DURING C-1 CHECK INSPECTION, FOUND LEFT HAND WING UPPER SURFACE STA XRS693 CORROSION LIMIT EXCEEDED, REFERENCE M-40 NBR. 88626. INSTALLED DOUBLER REPAIR IAW AIA ENGINEERING SKETCH NR 2423. CORROSION CARD NR 109L-0551. NON-ROUTINE TASK CARD NR 90769, LEVEL 2.