What was found
DURING C-CHECK INSPECTION WHILE ACCOMPLISHING AD 90-18-03, SB 57-98, FOUND LEVEL I CORROSION ON RIGHT WING LOWER T-CAP, INSIDE BARREL NUT HOLES IN STRINGERS NR 12, 13, 14, 15, 16, 17, 18, 19 AND 21. BLENDED IAW DC-9 SRM 51-10-3 AND SB 57-98.