As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING POWER UP FOR TAKEOFF AT 65 PERCENT TORQUE, TAKEOFF WARNING HORN SOUNDED. REJECTED TAKEOFF. CLEANED AND INSPECTED FLAP INDICATOR CONNECTOR. NO DEFECTS NOTED. CREW GROUND RAN ACFT AND INSPECTED SYS IAW MM 31-51-00. HORN STILL SOUNDED DURING POWER RUNS. RESET CIRCUIT BREAKER A-4. OPS CHECKED IAW WC 31-50-00Q. NO DEFECTS NOTED AT THIS TIME. OK FOR SERVICE.