As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE THE ACFT WAS IN HEAVY CHECK MAINT FOUND FRAME 17 CROSSBEAM IS CORRODED BETWEEN THE SEAT TRACKS. REMOVED CORROSION AT CROSSBEAM FR17 USING CUT-OUT REPAIR SRM 53-00-10 REPAIR 03P, 53-00-10 REPAIR 01P.FABRICATED AND INSTALLED REPAIR L ANGLE, DOUBLER AND FILLERS REF SRM53-00-10REPAIR 03P,53-00-10REPAIR 01P. APPLIED SURFACE PROTECTION REF. SRM 51-23-06. ACFT REMAINS IN HEAVY CHECK UNTIL COMPLETION.