As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE MX BASE CHECK FOUND CORROSION ON THE LT WING ASSY LOWER SKIN SURFACE AROUND WATER DRAIN AT RIB 5 BETWEEN STIFFNERS 6-7. THE ACFT WAS REMOVED FROM SERVICE. CORROSION WAS FOUND OUT OF LIMITS ON LT WING ASSY LOWER SKIN SURFACE AROUND WATER DRAIN AT RIB 5 BETWEEN STIFFENERS 6-7. PERFORMED SRI DO/TS-3833/11-15655 AND SRAS DO/TS-2187/10…5735 ISSUE C.