As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING 5 DEGREE FLAP TAKEOFF AT 20 KNOTS, CENTRAL AURAL WARNING HORN SOUNDED. ABORTED TAKEOFF AND RETURNED TO THE GATE. MAINTENANCE REPLACED THE UPPER STABILIZER TRIM POSITION WARNING SWITCH S532. OPERATIONAL CHECK NORMAL PER MM 31-26-24.