As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE CLIMBING THRU FLIGHT LEVEL 255. RECEIVED R-REV UNLOCK CAUTION MESSAGE. BOTH REVERSER DISARM AT THE TIME MESSAGE RECEIVED. MESSAGE PERSISTED UNTIL ENGINE SHUTDOWN AT GATE C/W QRH. DIVERTED. R & R RT T/R PDU IAW AMM 78-32-03. OPS CHECKED GOOD, REMOVED PLACARD AND MEL, R & REINSTALLED UPPER AND LOWER NOSE COWLS ON RT ENGINE IAW AWAC SUP 07-015 AND 07-016. RII I-145.