As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT REVERSER UNLOCK MESSAGE CAME ON OUT OF 13000 FT. FOLLOWED QRH. RETURNED TO DEPARTURE. MESSAGE EXTINGUISHED AT SHUTDOWN. "MEL. COMPLIED WITH MX ACTION H OF DEACTIVATION OF RT THRUST REVERSER REF AMM 78-30-00-040-802, REF BLK 2 FOR MEL. R & R RT ENGINE PDU RIG CHECK OPS CKD OK WITH SHOP AIR.