As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:C FX, RT WING CENTER SECTION REAR SPAR WEB FOUND CORROSION AT BS 1241 RBL 105-106 B/H FTG BTN NR 15 AND NR 16 FASTENER HEAD (RT WING LT W/W) REMAIN THICKNESS 0.345" TO 0.389'. FX , RT WING CENTER SECTION REAR SPAR WEB CORROSION REMOVED AS PER UPS EO B747-5710-11129-G APP B FIG 5 JUST AT BS1241 RBL105-106.