As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING MAINTENANCE INSPECTION CORROSION WAS DISCOVERED IN THE #1 AND #4 ALTERNATE FUEL TANK AREAS JUST INBOARD OF WS 421 ON THE BATH TUB FITTINGS. CORRODED AREAS WILL BE CLEANED, REPAIRED AND TREATED. THE DEFINED AREAS WILL BE MONITORED FOR CORROSION AND INSPECTED ANNUALLY DURING THE WINTER MAINTENANCE PROGRAM.