As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT THRUST REVERSER UNLOCK CAUTION MESSAGE DURING FLIGHT. ACCOMPLISHED QRH, AND SHUT DOWN RIGHT ENGINE. AIRSPEED 270, ALTITUDE 1400 WHEN CAUTION ACCURED. EMERGENCY STOW BUTTON DID NOT STOW THE REVERSER. REMOVED AND REPLACED THE RIGHT THRUST REVERSER STOW SWITCH AND PDU IAW AMM 78-37-01-400-801, & 78-32-03-400-803. OPS CHECKED GOOD.