As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AIRCRAFT 5647, L/P 1466781) CORROSION BELOW WATER TANK BTW STA. 1681 TO 1701 S-29R TO S-26R AT AFT CARGO COMPARTMENT. CORRECTIVE ACTION: CORROSION LEVEL 2. INTERNAL DOUBLER WAS REPLACED PER DWG: 146N3650 REV: AH AND PER B757-200 SRM 51-40-02-0G PAR 4 AND 7.