As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
***WHILE A/C WAS OUT OF SERVICE FOR HEAVY CHECK*** DISCREPANCY: 031-21 CENTER FUSELAGE III PASSENGER CABIN FLOOR STRUCTURE, CORROSION FOUND AT PANEL SUPPORT FRAME 84 RBL 36" AREA. CORRECTIVE ACTION: CENTER FUSELAGE III PASSENGER CABIN FLOOR STRUCTURE, PANEL SUPPORT REPLACED IAW SRM 51-41-01 A/C REMAINS OUT OF SERVICE FOR HEAVY CHECK COMPLETION.