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, CYCLED ALL APPROPRIATE SWITCHES AND LEVERS, NO FIX. FOUND NR 1 CONDITION LEVER SWITCH OUT OF RIG. RIGGED SWITCH AND LUBED. GROUND RAN AIRCRAFT, SYSTEM OPERATIONAL CHECK GOOD.