As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:4C, MAIN CABIN TRANSVERSE FRAME INTERCOSTAL AND UNDER "U" BLOCK SUPPORT STRUCTURE HAS CORROSION AT STA 1256 BETWEEN L1L AND L1R. REPAIRED CORRODED FRAME REF EO MD11-5310-42469-A AND STA SA EA 011-5310-01-A3048 REV IR AT STA 1256 BETWEEN L1L AND L1R.