As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER REMOVAL OF AFT TOILET SERVICE PANEL CORROSION WAS FOUND AROUND FUSELAGE SKIN BS 1540-1560 S-29R TO S-27R AT LOWER FUSELAGE. FUSELAGE SKIN STA 1540- 1560 S-29R TO S-27R AT LOWER FUSELAGE WAS REPAIRED PER ERA 634606-14 REV. ORIGINAL, SECTION I: REPAIR INSTRUCTIONS AND PRI 634606-14 REV. 0 TO REV 5. (1648948) AIRCRAFT WAS GROUNDED