As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THAT THE LEFT TR DID NOT DEPLOY AFTER LANDING WHEN COMMANDED, "ARM" ONLY. THE RIGHT TR OPERATED CORRECTLY. OPERATIONS WERE CONTINUED PER MEL 38-30-1. THE MAINTENANCE TEAM TROUBLESHOT AND CLEANED AND RESEATED THE CANNON PLUG TO THE CONTROL VALVE. THE TR WAS OPERATED 20 TIMES WITHOUT ANY FAULTS NOTED. NO DEFECTS NOTED. THE AIRCRAFT WAS RETURNED TO SERVICE.