Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 200; Flight Crew Total 20000; Flight Crew Type 984.42
Troubleshooting
Aircraft Equipment Problem Less Severe
Flight Crew Overcame Equipment Problem
Aircraft; Human Factors
All preflight; cockpit flows; and checklists were accomplished normally at the gate. On taxi out; I tested the Take-Off Warning and it indicated a configuration issue. We checked that the flaps; trim; spoiler and parking brake were correctly positioned and when we were satisfied that they were; I conducted the Take-Off Warning Test again and got a good test. I elected to continue since I felt that the transient issue had been corrected. On takeoff roll; we made the '100 kts' call indicating our entry into the high speed regime. At approximately 130-135 knots; the Take-off Warning Horn began to sound continuously. This was approximately 20 knots prior to V1. I (Pilot Monitoring) made the decision to continue and communicated that to the First Officer (Flying Pilot) by stating; 'Continue.' The Warning Horn silenced at main gear liftoff and initial climb out and the remainder of the flight was normal. I briefed today; as I always do; that in the high speed regime; I will only reject the takeoff for a fire; an engine failure; PWS (Predictive Wind Shear) or if the aircraft is unable to fly. In this situation; I was confident that the aircraft was configured correctly. I based this decision on the performance of checklists and the fact that the warning horn did not sound when the throttles were first advanced for takeoff.
B737 Captain reported continuing take-off when configuration warning horn activated at 135 knots.