Air carrier medium large transport takeoff warning horn sounded on takeoff causing flight crew to ab...

Attributes
ACN	161759
Time
Date	199011
Day	Thu
Local Time Of Day	0601 To 1200
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	climbout : takeoff other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : instrument pilot : atp pilot : commercial
Experience	flight time last 90 days : 240 flight time total : 8000 flight time type : 350
ASRS Report	161759
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical non adherence : far non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : rejected takeoff
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Cleared for takeoff 35L. Engine speed up, 10 KTS G/south achieved. Takeoff warning horn sounded. Throttles retarded slowly. Advised tower clearing runway to check aircraft, and that we have aborted takeoff roll. Clearance runway at L3 taxiway. No discrepancy found in confign to cause horn to sound. Ground control asked reason for rejected takeoff. Notified ground control of takeoff warning horn, and that it was the reason we decided not to continue takeoff roll. Rechked confign horn with power up on taxiway after rechking every possible cause. After final check, no indication of horn found. Suspect that speed brake vibrated out of detent, doing engine run-up and initial takeoff roll on 35L. This situation required us to reject the takeoff and exit the runway at L3 in the interest of safety; however, no log book write-up was made because no systems were inoperative. No systems inoperative and follow-up system check was satisfactory.

Original NASA ASRS Text

Title: ACR MLG TKOF WARNING HORN SOUNDED ON TKOF CAUSING FLT CREW TO ABORT.

Narrative: CLRED FOR TKOF 35L. ENG SPD UP, 10 KTS G/S ACHIEVED. TKOF WARNING HORN SOUNDED. THROTTLES RETARDED SLOWLY. ADVISED TWR CLRING RWY TO CHK ACFT, AND THAT WE HAVE ABORTED TKOF ROLL. CLRNC RWY AT L3 TXWY. NO DISCREPANCY FOUND IN CONFIGN TO CAUSE HORN TO SOUND. GND CTL ASKED REASON FOR REJECTED TKOF. NOTIFIED GND CTL OF TKOF WARNING HORN, AND THAT IT WAS THE REASON WE DECIDED NOT TO CONTINUE TKOF ROLL. RECHKED CONFIGN HORN WITH PWR UP ON TXWY AFTER RECHKING EVERY POSSIBLE CAUSE. AFTER FINAL CHK, NO INDICATION OF HORN FOUND. SUSPECT THAT SPD BRAKE VIBRATED OUT OF DETENT, DOING ENG RUN-UP AND INITIAL TKOF ROLL ON 35L. THIS SITUATION REQUIRED US TO REJECT THE TKOF AND EXIT THE RWY AT L3 IN THE INTEREST OF SAFETY; HOWEVER, NO LOG BOOK WRITE-UP WAS MADE BECAUSE NO SYSTEMS WERE INOP. NO SYSTEMS INOP AND FOLLOW-UP SYS CHK WAS SATISFACTORY.

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.

Air carrier medium large transport takeoff warning horn sounded on takeoff causing flight crew to abort.