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** MAINTENANCE FOUND 633-21 FWD FUSELAGE WET AREA FLOOR STRUCTURE FR16 LBL45" SILL WEB FOUND CORRODED. REPLACED SILL WEB IAW SRM 51-41-02 / 51-43-04. AIRCRAFT REMAINS OUT OF SERVICE FOR HEAVY CHECK COMPLETION.