As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. DURING TAKEOFF ROLL, RECEIVED A TAKEOFF CONFIGURATION WARNING. TAKEOFF WAS ABORTED AT APPROXIMATELY 40 KNOTS. MAINTENANCE REMOVED AND REPLACED SPEED BRAKE TAKE OFF CONFIGURATION WARNING SWITCH IAW AMM 27-62-00. OPERATIONAL CHECK NORMAL.