As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX- ON FLIGHT 2309 ABORTED TAKEOFF DUE TO TAKEOFF WARNING HORN SOUNDED AFTER ADVANCING POWER LEVERS. MAINTENANCE COMPLIED WITH TAKEOFF WARNING HORN IAW S/L DH8-400-SL-27-006-R1 AND FUNCTIONAL TEST IAW TASK 31-52-00-720-801 OF AMM. NO PARTS REPLACED. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.