As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MBV INSPECTION, QA FOUND LAVATORY RT FLOORBEAM CORRODED UNDER GUSSET AT FWD NUTPLATE HOLE. ACFT WAS REMOVED FROM SERVICE FOR MBV INSPECTION & WILL BE RETURNED TO SERVICE AFTER MBV INSPECTION. PERFORMED PERMANENT REPAIR TO LAVATORY RT FLOORBEAM UNDER GUSSET AT FWD NUTPLATE HOLE IAW ERS-EM-53MR-1187. REPAIR MATERIALS, DOUBLER 2024T3 .050.