As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPLICATION OF TAKEOFF POWER, INTERMITTENT WARNING HORN SOUNDED. ABORTED TAKEOFF, RECYCLED FLAP AND SPEED BRAKE CONTROLS. ON SECOND DEPARTURE ATTEMPT, SAME RESULTS OCCURRED. RETURNED TO THE GATE AND DEPLANED AIRCRAFT. MAINTENANCE FOUND S532 UPPER STABILIZER TRIM WARNING SWITCH INOPERATIVE. REPLACED SWITCH AND PERFORMED OPERATIONAL CHECK, NO DISCREPANCIES NOTED.