<< >> NASA ASRS Report 421709, December 1998

Captain of a B727 aborted takeoff due to the sounding of the takeoff confign warning horn. Flight crew returned for takeoff, after system check and discussion with company maintenance, with no further problems.

Attributes
ACN	421709
Time
Date	199812
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sfo
State Reference	CA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Flight Phase	other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer
Experience	flight time last 90 days : 200 flight time total : 16000 flight time type : 7000
ASRS Report	421709
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : rejected takeoff
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

Takeoff aborted on initial power application due to takeoff warning horn. Cleared runway and stopped aircraft. Checked confign and found flaps, slats, speed brake, stabilizer trim all in proper position. Ran up power to 1.4 EPR and horn did not sound. Contacted company dispatch and maintenance center, all agreed another attempt was acceptable. Recycled flaps up, then back to 15 degrees. Next takeoff attempt was normal. Incident was recorded in a logbook, and reported to tower as abort due to 'takeoff warning horn.' brake cooling time was not a factor due to aircraft never accelerated past fast taxi speed.

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Original NASA ASRS Text

Title: CAPT OF A B727 ABORTED TKOF DUE TO THE SOUNDING OF THE TKOF CONFIGN WARNING HORN. FLC RETURNED FOR TKOF, AFTER SYS CHK AND DISCUSSION WITH COMPANY MAINT, WITH NO FURTHER PROBS.

Narrative: TKOF ABORTED ON INITIAL PWR APPLICATION DUE TO TKOF WARNING HORN. CLRED RWY AND STOPPED ACFT. CHKED CONFIGN AND FOUND FLAPS, SLATS, SPD BRAKE, STABILIZER TRIM ALL IN PROPER POS. RAN UP PWR TO 1.4 EPR AND HORN DID NOT SOUND. CONTACTED COMPANY DISPATCH AND MAINT CTR, ALL AGREED ANOTHER ATTEMPT WAS ACCEPTABLE. RECYCLED FLAPS UP, THEN BACK TO 15 DEGS. NEXT TKOF ATTEMPT WAS NORMAL. INCIDENT WAS RECORDED IN A LOGBOOK, AND RPTED TO TWR AS ABORT DUE TO 'TKOF WARNING HORN.' BRAKE COOLING TIME WAS NOT A FACTOR DUE TO ACFT NEVER ACCELERATED PAST FAST TAXI SPD.

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.