As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MX INSP FOUND THE LT WING LOWER SKIN RIB NR 5 FUEL DRAIN VALVE SURROUNDING AREA WITH CORROSION. THE ACFT WAS REMOVED FROM SERVICE. FOLLOWING TURNOVER PERFORMED ALL REMAINING STEPS EO E2-5700-488. C/W E2-5700-488 LOWER WING BETWEEN RIB 4 & 5 BLEND OUT. THE ACFT WAS RETURNED TO SERVICE.