As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS OUT OF SERVICE FOR HEAVY CHECK, MAINTENANCE FOUND LEVEL 2 CORROSION AFT WET AREA FR 84-85 RBL12 FLOORBEAM DOUBLER. THEY REMOVED AND REPLACED DOUBLER IAW SRM 51-41-01. AIRCRAFT REMAINS OUT OF SERVICE FOR HEAVY CHECK COMPLETION.