As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE-D, CONTROL CABIN SUB FLOOR STA 75 LBL 59 FINGER DOUBLER IS CORRODED INTERNALLY WITH 7 CORRODED AND SHEARED RIVETS. REMOVED FINGER DOUBLER. REMOVED CORROSION UNDER DOUBLER (WITHIN LIMITS) FABRICATED AND INSTALLED FINGER DOUBLER PER SRM 53-3-1 FIG 7D AND 51-1-21.