As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON LANDING, USED THRUST REVERSER, STOWED IT, THE LEFT UNLOCK MESSAGE CAME ON. LEFT ENGINE THEN SHUTDOWN WITH THRUST REVERSER LEVER AT IDLE. LEFT INDICATIONS NORMAL EXCEPT REVERSER AND UNLOCK LIGHTS ON. PERFORMED ENGINE RUN IAW AMM 71-00-00 AND OPS CHECKED BOTH THRUST REVERSERS IAW AMM 78-30-00. NO DEFECTS NOTED, FOUND LEFT THRUST REVERSER UNSTOWED. AIRCRAFT OK FOR SERVICE.