As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO COMPARTMENT 'Z' ANGLE CHANNEL CORRODED AROUND ANCHOR NUTS BETWEEN FSTA 747 &767 RBL-21<[01] AFT CARGO R/H Z CHANNEL REPLACED FROM STA 727-767 RBL 21 FOR WORK ACCOMPLISHED REFERENCE TASKCARD# TTG8Q00HRLAA;[02] VERIFIED STEP 1.