As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 1215 - EN ROUTE EWR-DFW - ON CLIMB-OUT, RIGHT SIDE THRUST REVERSER UNLOCK LIGHT ILLUMINATED AT 11,000 FEET. THRUST REVERSER UNLOCK LIGHT WENT OFF SHORTLY THERE AFTER. REVERSER REMAINED STOWED. LANDED DFW WITHOUT INCIDENT. CLEANED RIGHT SIDE LOWER UNLOCK SWITCH. REPLACED RIGHT SIDE UPPER UNLOCK SWITCH. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)