<< >> NASA ASRS Report 138397, March 1990

Takeoff aborted.

Attributes
ACN	138397
Time
Date	199003
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : phx
State Reference	AZ
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 : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 230 flight time total : 10000 flight time type : 230
ASRS Report	138397
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 230 flight time total : 7500 flight time type : 1500
ASRS Report	138728
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : rejected takeoff flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	other

Narrative:

When throttles were advanced for takeoff the takeoff warning horn sounded. Takeoff run was aborted. After clearing the runway all items that could have caused the warning were rechked and found to be set properly, and although the speed brake 'do not arm' light was extinguished, I bumped the speed brake handle forward with the heel of my hand and it moved maybe 1 MM. Subsequent checks of the warning system proved that this action solved the problem (no warning horn when throttles were advanced), so I returned to the runway and continued with the scheduled flight sequence. When the tower controller asked the reason for the abort, I told him 'a false takeoff warning.' after some consideration and discussion with my first officer of the events, we each decided to submit NASA reports just in case the FAA disagrees with the decision.

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Original NASA ASRS Text

Title: TKOF ABORTED.

Narrative: WHEN THROTTLES WERE ADVANCED FOR TKOF THE TKOF WARNING HORN SOUNDED. TKOF RUN WAS ABORTED. AFTER CLRING THE RWY ALL ITEMS THAT COULD HAVE CAUSED THE WARNING WERE RECHKED AND FOUND TO BE SET PROPERLY, AND ALTHOUGH THE SPD BRAKE 'DO NOT ARM' LIGHT WAS EXTINGUISHED, I BUMPED THE SPD BRAKE HANDLE FORWARD WITH THE HEEL OF MY HAND AND IT MOVED MAYBE 1 MM. SUBSEQUENT CHKS OF THE WARNING SYS PROVED THAT THIS ACTION SOLVED THE PROB (NO WARNING HORN WHEN THROTTLES WERE ADVANCED), SO I RETURNED TO THE RWY AND CONTINUED WITH THE SCHEDULED FLT SEQUENCE. WHEN THE TWR CTLR ASKED THE REASON FOR THE ABORT, I TOLD HIM 'A FALSE TKOF WARNING.' AFTER SOME CONSIDERATION AND DISCUSSION WITH MY F/O OF THE EVENTS, WE EACH DECIDED TO SUBMIT NASA RPTS JUST IN CASE THE FAA DISAGREES WITH THE DECISION.

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.