What was found
INSPECTION TYPE:3C, SUB FLOOR CENTER WING BOX UPPER SKIN AT BS 1229-1239, RBL10 TO RBL 18 HAS SEVERAL AREAS OF HEAVY CORROSION. ACCOMPLISHED PERMANENT BLEND REPAIR TO UPPER FWD CENTER WING SKIN AT XCW -24 TO XCW 8 AT STR 15 IAW EA 011-5710-01-A6170, REV I/R AND EO MD11-5730-60305-A.