Takeoff aborted when takeoff warning horn sounds.

Attributes
ACN	254934
Time
Date	199310
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : iah
State Reference	TX
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	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : takeoff other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 200
ASRS Report	254934
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 14500 flight time type : 13000
ASRS Report	254203
Events
Anomaly	aircraft equipment problem : less severe non adherence : published procedure
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:

Takeoff warning horn sounded as throttles advanced. Captain rejected takeoff at low speed, taxied off, checked speed brake. It was 1/16 inch out of detent (all the way forward but 1/16 up). This allowed for the test to show in detent but horn sounded on takeoff. Placed speed brake in full detent, advanced throttle and horn did not come on. We then taxied back and made normal takeoff. Mechanic sprayed wd-40 substance on speed brake at next stop. Speed brake operated okay.

Original NASA ASRS Text

Title: TKOF ABORTED WHEN TKOF WARNING HORN SOUNDS.

Narrative: TKOF WARNING HORN SOUNDED AS THROTTLES ADVANCED. CAPT REJECTED TKOF AT LOW SPD, TAXIED OFF, CHKED SPD BRAKE. IT WAS 1/16 INCH OUT OF DETENT (ALL THE WAY FORWARD BUT 1/16 UP). THIS ALLOWED FOR THE TEST TO SHOW IN DETENT BUT HORN SOUNDED ON TKOF. PLACED SPD BRAKE IN FULL DETENT, ADVANCED THROTTLE AND HORN DID NOT COME ON. WE THEN TAXIED BACK AND MADE NORMAL TKOF. MECH SPRAYED WD-40 SUBSTANCE ON SPD BRAKE AT NEXT STOP. SPD BRAKE OPERATED OKAY.

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.