An air carrier rejects takeoff for a takeoff confign warning.

Attributes
ACN	534970
Time
Date	200201
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mdw.airport
State Reference	IL
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757-300
Operating Under FAR Part	Part 121
Flight Plan	IFR
Aircraft 2
Navigation In Use	other
Flight Phase	ground : takeoff roll
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi pilot : flight engineer
Experience	flight time last 90 days : 120 flight time total : 15000 flight time type : 120
ASRS Report	534970
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : less severe conflict : ground less severe non adherence : published procedure non adherence : company policies other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : tkof config warning
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

After pushback there was confusion locating the ground crew for a visual confirmation of the gear pin removal. During this confusion, ground control was issuing a taxi clearance. We started taxiing and instead of going through our normal checklist and flow sequence we started a 'differences' briefing for the -300 aircraft. We discussed the slower rotation requirement as the plane is 23 ft longer, the larger taxi turn radius. The 'grabby' brakes, etc. As we were taxiing we were also watching and timing ourselves with another plane that we were converging with. We started our before takeoff checklist as tower called instructing us to 'position and hold.' we interrupted our checklist again to acknowledge this clearance and call our cabin crew to see if they were ready. We hurriedly resumed our checklist as tower called assigning us a heading and clearance for takeoff. When takeoff thrust was set, the 'takeoff confign' warning sounded. We had skipped the setting of the flaps. We cleared the runway at the first exit, the airspeed was never 'alive,' the brakes were very lightly used. After clearing the runway, we did a slow, thorough, complete checklist, rebrief and departed. This was the third night of 'red eye' all nighters. We were tired and allowed ourselves to get rushed.

Original NASA ASRS Text

Title: AN ACR REJECTS TKOF FOR A TKOF CONFIGN WARNING.

Narrative: AFTER PUSHBACK THERE WAS CONFUSION LOCATING THE GND CREW FOR A VISUAL CONFIRMATION OF THE GEAR PIN REMOVAL. DURING THIS CONFUSION, GND CTL WAS ISSUING A TAXI CLRNC. WE STARTED TAXIING AND INSTEAD OF GOING THROUGH OUR NORMAL CHKLIST AND FLOW SEQUENCE WE STARTED A 'DIFFERENCES' BRIEFING FOR THE -300 ACFT. WE DISCUSSED THE SLOWER ROTATION REQUIREMENT AS THE PLANE IS 23 FT LONGER, THE LARGER TAXI TURN RADIUS. THE 'GRABBY' BRAKES, ETC. AS WE WERE TAXIING WE WERE ALSO WATCHING AND TIMING OURSELVES WITH ANOTHER PLANE THAT WE WERE CONVERGING WITH. WE STARTED OUR BEFORE TKOF CHKLIST AS TWR CALLED INSTRUCTING US TO 'POS AND HOLD.' WE INTERRUPTED OUR CHKLIST AGAIN TO ACKNOWLEDGE THIS CLRNC AND CALL OUR CABIN CREW TO SEE IF THEY WERE READY. WE HURRIEDLY RESUMED OUR CHKLIST AS TWR CALLED ASSIGNING US A HDG AND CLRNC FOR TKOF. WHEN TKOF THRUST WAS SET, THE 'TKOF CONFIGN' WARNING SOUNDED. WE HAD SKIPPED THE SETTING OF THE FLAPS. WE CLRED THE RWY AT THE FIRST EXIT, THE AIRSPD WAS NEVER 'ALIVE,' THE BRAKES WERE VERY LIGHTLY USED. AFTER CLRING THE RWY, WE DID A SLOW, THOROUGH, COMPLETE CHKLIST, REBRIEF AND DEPARTED. THIS WAS THE THIRD NIGHT OF 'RED EYE' ALL NIGHTERS. WE WERE TIRED AND ALLOWED OURSELVES TO GET RUSHED.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.