As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED RIGHT ENGINE REV UNLOCKED CAUTION MESSAGE DURING FLIGHT EN ROUTE FROM CLT TO DCA. CREW DIVERTED TO RIC AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT THRUST REVERSER SYSTEM, REMOVED AND REPLACED RIGHT ENGINE ORANGE ELECTRICAL HARNESS AND PERFORMED CHECKS USING AIRCRAFT MAINTENANCE MANUALS. AIRCRAFT RELEASED FOR SERVICE.