As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 0631 - WHILE PREPARING TO TAKEOFF FROM LAS EN ROUTE TO OAK TAKEOFF CONFIGURATION WARNING SOUNDED AFTER APPLYING FULL THRUST, TAKEOFF ABORTED. MAINTENANCE CLEANED THE SPEED BRAKE WARNING SWITCH, TAKEOFF WARNING TEST WAS GOOD IAW BMM 31-26-00 AND T/C A1B31009.