As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK MAINTENANCE FOUND CORROSION STRUCTURAL CENTER FUSELAGE III WET AREA 53-23 RH BEAM Y=+10.748" AT FRAME 87 AROUND THE RIVETS. FABRICATED AND INSTALLED REPAIR DOUBLER FOR RH FLOOR BEAM BETWEEN FRAMES 87-88 PER SRM 53-23-10/ REPAIR 01P. APPLIED SURFACE PROTECTION TO AREA PER SRM 51-*23-05, 51-23-06. A/C REMAINS IN CHECK.