B737-800
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe
Flight Crew Rejected Takeoff
Aircraft
On takeoff; power was advanced to approximately 40% N1; engines stabilized with normal engine indications. Takeoff thrust was set. FO made '80 Knots' callout. At approximately 100 knots; the Takeoff Warning horn sounded and the TAKEOFF CONFIG light illuminated. I initiated a Rejected Takeoff. Tower was notified. Aircraft was safely taxied off of the active runway. ARFF was requested to assist -- thermal inspection accomplished. ARFF vehicles accompanied us back to the gate. Flap configuration was 1 per the TPS. Flaps were set prior to taxi and not changed. Flap lever fully seated in selected detent. Speed Brake lever fully in down position. Appropriate trim setting in Green Takeoff range.
At approximately 100 knots the takeoff configuration warning light illuminated and the horn was going off with speed brakes fully stowed; trim in the green takeoff setting around 6 units and flaps 1 per the TPS. The takeoff was rejected; notified tower and asked for fire/emergency trucks to look the aircraft over before proceeding to the gate.
B737-800 flight crew experienced an aural takeoff configuration warning horn at approximately 100 knots during attempted takeoff; which was aborted.