On takeoff roll warning horn sounds. Takeoff aborted.

Attributes
ACN	234993
Time
Date	199302
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : pit
State Reference	PA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
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	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 : 130 flight time total : 14000 flight time type : 5000
ASRS Report	234993
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : rejected takeoff
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During initial takeoff roll, the confign warning horn sounded. The flaps, trim, and speed brakes were checked and were in the correct position, but the warning horn continued. I elected to discontinue the takeoff. Speed was only 60 KTS. So the rejected takeoff function of the autobrake did not activate. After turning off the runway, trim was reset (near aft limit of green band), and flaps and speed brake were checked. The takeoff warning did not sound when tested. Brake cooling was checked and was not a factor, so I elected to takeoff without returning to the gate. The rest of the flight was uneventful.

Original NASA ASRS Text

Title: ON TKOF ROLL WARNING HORN SOUNDS. TKOF ABORTED.

Narrative: DURING INITIAL TKOF ROLL, THE CONFIGN WARNING HORN SOUNDED. THE FLAPS, TRIM, AND SPD BRAKES WERE CHKED AND WERE IN THE CORRECT POS, BUT THE WARNING HORN CONTINUED. I ELECTED TO DISCONTINUE THE TKOF. SPD WAS ONLY 60 KTS. SO THE RTO FUNCTION OF THE AUTOBRAKE DID NOT ACTIVATE. AFTER TURNING OFF THE RWY, TRIM WAS RESET (NEAR AFT LIMIT OF GREEN BAND), AND FLAPS AND SPD BRAKE WERE CHKED. THE TKOF WARNING DID NOT SOUND WHEN TESTED. BRAKE COOLING WAS CHKED AND WAS NOT A FACTOR, SO I ELECTED TO TKOF WITHOUT RETURNING TO THE GATE. THE REST OF THE FLT WAS UNEVENTFUL.

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.