Got takeoff warning horn at beginning of takeoff roll. Takeoff aborted.

Attributes
ACN	290227
Time
Date	199412
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : tus
State Reference	AZ
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : pae
Operator	common carrier : air carrier
Make Model Name	B737-500
Operating Under FAR Part	Part 121
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 : 232 flight time total : 21825 flight time type : 6980
ASRS Report	290227
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	none taken : unable
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Received warning horn when thrust was applied for takeoff in tucson -- taxied clear of runway and started to troubleshoot with contract maintenance -- found a dead spot on speed brake handle between speed brake armed indication and forward detent.

Original NASA ASRS Text

Title: GOT TKOF WARNING HORN AT BEGINNING OF TKOF ROLL. TKOF ABORTED.

Narrative: RECEIVED WARNING HORN WHEN THRUST WAS APPLIED FOR TKOF IN TUCSON -- TAXIED CLR OF RWY AND STARTED TO TROUBLESHOOT WITH CONTRACT MAINT -- FOUND A DEAD SPOT ON SPD BRAKE HANDLE BTWN SPD BRAKE ARMED INDICATION AND FORWARD DETENT.

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.