As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2336: AT THE END OF THE RUNWAY, COULD NOT SILENCE THE TAKEOFF WARNING HORN WHEN TRYING TO CONDUCT THE T/O WARNING TEST. AIRCRAFT RETURNED TO GATE. MAINTENANCE C/W OPERATIONAL TEST OF THE TAKEOFF WARNING SYSTEM IAW AMM 31-40-00-710-802, SUBTASK 31-41-00-710-022. OPS CHECK GOOD. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.