What was found
UPON ADVANCING THROTTLES FOR TAKEOFF, RECEIVED TAKEOFF WARNING HORN AT ABOUT 20 KTS. RETURNED TO THE GATE. REPLACED TAKEOFF WARNING HORN, OPERATIONAL CHECK OK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
UPON ADVANCING THROTTLES FOR TAKEOFF, RECEIVED TAKEOFF WARNING HORN AT ABOUT 20 KTS. RETURNED TO THE GATE. REPLACED TAKEOFF WARNING HORN, OPERATIONAL CHECK OK.