As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) IN THE CLIMB THE RT THRUST REVERSER UNLOCKED MESSAGE CAME UP INTERMITTENTLY. THE ACFT RETURNED TO THE DEPARTURE AIRPORT AND LANDED UNEVENTFULLY. MAINTENANCE T/S FOUND THE RT T/R THROTTLE LOCKOUT SWITCH AT FAULT. THE SWITCH WAS REPLACED AND FUNCTION CHECKED AND THE ACFT RETURNED TO SERVICE. SWITCH, PN 1EN289-3, IPC 78-37-01, FIG 1A-80