An air carrier medium large transport aborted its takeoff because of a warning horn.

Attributes
ACN	224939
Time
Date	199210
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : den
State Reference	CO
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	ground : preflight other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 8000 flight time type : 1300
ASRS Report	224939
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other other : unspecified
Resolutory Action	flight crew : rejected takeoff other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

In preparing for takeoff, we set the flaps to 1. Application of power for takeoff, the warning horn sounded. We aborted takeoff and recycled flaps. Went back to gate. Called maintenance. They discovered we misset flaps to 1. They should have been set to 5.

Original NASA ASRS Text

Title: AN ACR MLG ABORTED ITS TKOF BECAUSE OF A WARNING HORN.

Narrative: IN PREPARING FOR TKOF, WE SET THE FLAPS TO 1. APPLICATION OF PWR FOR TKOF, THE WARNING HORN SOUNDED. WE ABORTED TKOF AND RECYCLED FLAPS. WENT BACK TO GATE. CALLED MAINT. THEY DISCOVERED WE MISSET FLAPS TO 1. THEY SHOULD HAVE BEEN SET TO 5.

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.