As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - FLIGHT 6086, DURING T/O THE CREW REPORTED THAT UPON COMMANDING "CLB" THRUST, THE THRUST RATING WENT TO "T/O RSV", AND DURING DESCENT WENT TO "T/O RSV " THEN "E T/O" UNCOMMANDED. THE AIRCRAFT LANDED AT DEN WITHOUT INCIDENT WHERE MAINTENANCE OPERATIONALLY TESTED THE THRUST RATING MODULE CONTROL SYSTEM WITH NO DEFECTS NOTED, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.