What was found
LT WING PLANK HAS CORROSION UNDER THE FOLLOWING FUEL TANK PANELS 550BB, 540ED, 540BB, 510AB. REMOVED MINOR CORROSION FROM LT WING LOWER PLANK AT FUEL ACCESS PANELS 550BB, 540FB, 540EB, 540BB AND 510AB IAW MFG REO 601R-57-21-030 REV C. (M)