As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE THE ACFT IS IN HEAVY CHECK FOUND FRAME 19 CROSSBEAM FLOOR SUPPORT AT LT FLOOR SILL CORRODED. REMOVED AND REPLACED FRAME 19-20 CROSSBEAM FLOOR SUPPORT AT LT INBD FR19-20. REF SRM 51-40-08, RESTORED SURFACE PROTECTION REF SRM 51-23-06 CPM 51-25-00. ACFT REMAINS IN HEAVY CHECK UNTIL COMPLETION.