On power up for takeoff warning horn sounds. Takeoff aborted.

Attributes
ACN	282905
Time
Date	199409
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lga
State Reference	NY
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	Commercial Fixed Wing
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 : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 170 flight time total : 10000 flight time type : 1250
ASRS Report	282905
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : rejected takeoff
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Tower cleared us into position and hold runway 31. Prior to being in position tower asked if we could take off on the roll, traffic 2 mi final runway 22, we said yes. Runway was wet from an earlier shower engines were slow to spool up. Upon engaging autothrottles for 'toga' the takeoff warning horn sounded. Knowing that all checklists had been read and complied with, we double-checked our confign. Flaps were at 5 degrees, speed brake was down and detent and trim was at 5.7 (6.3 is limit). When we touched the trim wheel the warning stopped. At this point though (still less than 80 KTS) the decision to abort had already been made, so that more time could be spent to re-evaluate our situation. Returned to runway for normal take off.

Original NASA ASRS Text

Title: ON PWR UP FOR TKOF WARNING HORN SOUNDS. TKOF ABORTED.

Narrative: TWR CLRED US INTO POS AND HOLD RWY 31. PRIOR TO BEING IN POS TWR ASKED IF WE COULD TAKE OFF ON THE ROLL, TFC 2 MI FINAL RWY 22, WE SAID YES. RWY WAS WET FROM AN EARLIER SHOWER ENGS WERE SLOW TO SPOOL UP. UPON ENGAGING AUTOTHROTTLES FOR 'TOGA' THE TKOF WARNING HORN SOUNDED. KNOWING THAT ALL CHKLISTS HAD BEEN READ AND COMPLIED WITH, WE DOUBLE-CHKED OUR CONFIGN. FLAPS WERE AT 5 DEGS, SPD BRAKE WAS DOWN AND DETENT AND TRIM WAS AT 5.7 (6.3 IS LIMIT). WHEN WE TOUCHED THE TRIM WHEEL THE WARNING STOPPED. AT THIS POINT THOUGH (STILL LESS THAN 80 KTS) THE DECISION TO ABORT HAD ALREADY BEEN MADE, SO THAT MORE TIME COULD BE SPENT TO RE-EVALUATE OUR SIT. RETURNED TO RWY FOR NORMAL TAKE OFF.

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.