As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STL INFLIGHT T863/08MAY PHL TO DFW - CREW REPORTED NUMBER ONE ENGINE REVERSER UNLOCK LIGHT ILLUMINATED. NO YAW ASSOCIATED WITH INDICATION. CREW SHUT DOWN NUMBER ONE ENGINE. LANDED STL WITHOUT INCIDENT. SINGLE ENGINE TIME 31 MINUTES. FOUND BOTH UPPER AND LOWER SWITCHES WORN. REPLACED BOTH UPPER AND LOWER SWITCHES. SYSTEM GROUND CHECKED NORMAL OPERATION.