As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE A/C WAS OUT OF SERVICE FOR HVY CHECK, MAINTENANCE FOUND LEVEL 2 CORROSION AFT WET AREA RT OB FLOOR PANEL SUPPORT AFT OF R2 DOOR FR 89. THEY REMOVED AND REPLACED FLOOR PANEL SUPPORT IAW SRM 51-42-01. AIRCRAFT REMAINS OUT OF SERVICE FOR HVY CHECK COMPLETION.