As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TAKEOFF WARNING HORN SOUNDED DURING TAKEOFF ROLL. ABORTED TAKEOFF AT 20 KNOTS AND RETURNED TO GATE. MAINTENANCE REPAIRED LOOSE WIRE AT HORIZONTAL STABILIZER POSITION SWITCH IN FORWARD BAG BIN. OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE.