As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 440 - ON TAKEOFF ROLL AT LAS EN ROUTE TO IAH, A LOW SPEED ABORTED TAKEOFF OCCURRED DUE TO A REPORT OF A TAKEOFF CONFIGURATION WARNING HORN SOUNDED AT THROTTLE ADVANCEMENT. MAINTENANCE PERFORMED A TAKEOFF SYSTEM WARNING TEST IAW AWA TASKCARD NR A1B31009. NO FAULTS FOUND. OPERATIONAL CHECK GOOD.