Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Time Pressure
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Became Reoriented; Flight Crew Rejected Takeoff
Human Factors; Weather; Aircraft
On takeoff roll at about 100 knots got aural 'Flaps' warning. Rejected takeoff. Complied with QRH. Had green box for takeoff. Discovered dial a flap at 13 degrees with FMS Takeoff page set to 10 degrees. Original takeoff computation called for 13 degrees. Just prior to taking [the] runway tower called windshear advisories. Recalculated numbers for windshear profile; Max power and 10 degrees flaps. Forgot to adjust dial a flap but still had green box prior to taking runway. Don't know why we did not have white box or why Caution and Warning System (CAWS) did not annunciate at power push up or why it waited until about 100 kts to sound off. Should have done the before takeoff checklist again from the top. Easy to miss the dial a flap if it is close to desired setting. Thought we had everything squared away pulling onto runway subsequent takeoff uneventful.
On Taxi to [the] Runway we configured the aircraft and did the before Takeoff checklist. The dial flap was set at 13 and the FMS flaps to 13 and the PFD showed 11. At the approach end of [the Runway] we had to rerun the performance software for Windshear advisory in affect. The new computed flap setting was 10. We set the FMS to 10 Flaps and the PFD showed 11. The dial flap was at 13. We did the before takeoff checklist and I cross checked the FMS flap 10 with the PFD flap indicator of 11. However the dial a flap was at 13 but we had a green takeoff box. Got cleared for takeoff and pushed up power to max power setting and started our roll. No flap warning at power up and still had green takeoff box. Eighty knot check was fine but at 95 knots we got the flap audio warning and we rejected the Takeoff. We did the RTO procedures and cleared runway and finished the RTO QRH checklist. We did an after landing checklist and checked the brake temp charts. We wrote the RTO in the [maintenance log] and contacted maintenance. There was no maintenance required so we reconfigured the aircraft for Takeoff again and double check all settings. FMS at 10; PFD was 10 this time and the dial a flap set to 10. We had a green takeoff box and got cleared for takeoff. Did another Takeoff without any problems.We cross checked the new calculated flap setting of 10 in the FMS and the PFD indicator but did not reset the dial a flap to 10. The takeoff warning system should have said something at power up and not 95kts. Also there should have not been a green box. Need to cross check the dial a flap with FMS and PFD indications after recalculating the Takeoff flaps.
MD11 flight crew reported changing the FMS flap setting to 10 during taxi out due to a windshear advisory; but forgot to change the dial a flap setting from 13 to 10. A flap audio warning is annunciated during the takeoff and the takeoff is rejected.