As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE FROM KXNA TO KDTW THE L REV UNLOCKED MESSAGE ILLUMINATED. THE FLIGHT CREW RAN THE QRH AND ADVISED ATC AND COMPANY SOC. THE AIRCRAFT WAS ROUTED TO THE NEAREST SUITABLE AIRPORT. AN OTHERWISE NORMAL APPROACH AND LANDING WAS MADE AT KFWA. MAINTENANCE INSPECTED THE THRUST REVERSER AND DEFERRED IT PER THE MEL. THE AIRCRAFT WAS RELEASED FOR SERVICE AND CONTINUED ON TO KDTW.