What was found
WING CTR SECT FUEL TANK BLKHD STA 1156 HAS INTERGRANULAR CORROSION AT VERTICAL STIFFENER O/B OF OPENING PNL143CZ, FWD FACE, LWR AREA. REMOVED CORROSION FROM AFFECTED AREA IAW DC10 SRM 51-21-01. THICKNESS LIMIT CK'D OK. ALONDINED AND PAINTED AFFECTED AREA IAW DC10 SRM 51-21-01.