As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE: 4C, CENTER WING UPPER SKIN IN MAIN CABIN SUBFLOOR CORRODED NEAR BS 1234 RBL 83 (STA XCW -81 BETWEEN S14 & S15). REPAIRED CORRODED CENTER WING UPPER SKIN AT XCW -81 BETWEEN S14 AND S15 IAW EA 011-5730-01-A4213 REV IR AND EO MD11-5730-48439-A.