As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE FOUND AFT CARGO DOOR LOWER BEAM FWD FINGER DOUBLER CORRODED AT FRAME 77, PREVIOUSLY BLENDED. REMOVED CORRODED FINGER DOUBLER. LOCATED DRILLED AND TREATED NEW DOUBLE. INSTALLED AND TOP COATED NEW DOUBLER IAW SRM 53-23-11.