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. ABORTED TAKEOFF AT ABOUT 15 KNOTS. RAN CHECKLIST AND FOUND NOTHING OUT OF POSITION. CHECKED CDS SYSTEM AND FOUND NO RELATED FAULTS. PERFORMED OPS TEST OF TAKEOFF WARNING SYSTEM IAW AMM TASK 31-52-00-710-801. CHECKED GOOD. NO FAULTS FOUND. COULD NOT DUPLICATE. RETURNED TO SERVICE.