As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS OUT OF SERVICE FOR HEAVY CHECK, LEVEL 2 CORROSION WAS FOUND AT FWD WET AREA FLOOR SILL WEB JUST FWD OF R1 DOOR CUTOUT. SILL WEB WAS REMOVED AND REPLACED IAW SRM 51-40-02. AIRCRAFT REMAINS OUT OF SERVICE FOR HEAVY CHECK COMPLETION.