Air carrier large transport takeoff abort when takeoff warning horn sounded as power was advanced.

Attributes
ACN	197562
Time
Date	199112
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw
State Reference	TX
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	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : takeoff other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 85 flight time total : 8700 flight time type : 6000
ASRS Report	197562
Person 2
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 210 flight time total : 2100 flight time type : 280
ASRS Report	197991
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : rejected takeoff
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Upon initial power application for takeoff, takeoff warning horn sounded. Discontinued takeoff and taxied clear of runway. Horn had been checked on taxi checklist. All controls appeared to be positioned normally but actual position of speed (spoiler) brake handle could not be verified as it was extended as part of abort procedure. Ran up engines on taxiway with tower permission and could not duplicate problem. Aircraft was a model recently purchased from another air carrier and had automatic spoiler system which was deactivated. Our company's aircraft had manual spoilers. Believe difference in systems accounted for horn activation. With takeoff warning system now fully operational completed uneventful takeoff and flight.

Original NASA ASRS Text

Title: ACR LGT TKOF ABORT WHEN TKOF WARNING HORN SOUNDED AS PWR WAS ADVANCED.

Narrative: UPON INITIAL PWR APPLICATION FOR TKOF, TKOF WARNING HORN SOUNDED. DISCONTINUED TKOF AND TAXIED CLR OF RWY. HORN HAD BEEN CHKED ON TAXI CHKLIST. ALL CTLS APPEARED TO BE POSITIONED NORMALLY BUT ACTUAL POS OF SPD (SPOILER) BRAKE HANDLE COULD NOT BE VERIFIED AS IT WAS EXTENDED AS PART OF ABORT PROC. RAN UP ENGS ON TXWY WITH TWR PERMISSION AND COULD NOT DUPLICATE PROBLEM. ACFT WAS A MODEL RECENTLY PURCHASED FROM ANOTHER ACR AND HAD AUTO SPOILER SYS WHICH WAS DEACTIVATED. OUR COMPANY'S ACFT HAD MANUAL SPOILERS. BELIEVE DIFFERENCE IN SYSTEMS ACCOUNTED FOR HORN ACTIVATION. WITH TKOF WARNING SYSTEM NOW FULLY OPERATIONAL COMPLETED UNEVENTFUL TKOF AND FLT.

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.