What was found
DURING D-CHECK, FOUND LEFT WING CENTER LEADING EDGE UPPER SKIN HAS CORROSION FROM STATION XFS 423 TO 525. REMOVED DAMAGED SKIN. FABRICATED NEW SKIN AND INSTALLED IN ACCORDANCE WITH DOUGLAS AIRCRAFT COMPANY, SRM 57-3-2-, 51-1-21 AND 51-1-21D. WORK ACCOMPLISHED UNDER ARROW AIR FORM JW3B, WORK ORDER 970101, ITEM NR 2939, CONTROL NR 5103A.