A B737-300 crew had the takeoff warning horn sound as takeoff thrust was applied for takeoff.

Attributes
ACN	557073
Time
Date	200208
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : msy.airport
State Reference	LA
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : okc.tower
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
ASRS Report	557073
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	non adherence : published procedure non adherence : company policies non adherence : far other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : tkof warning horn other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : rejected takeoff none taken : detected after the fact other
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

All checklists and procedures were followed and completed with policy. The checklists were read and the proper response was given. Upon application of power for takeoff, the takeoff warning horn sounded. We exited the runway where the stabilizer trim was discovered to be set towards the aft end of the takeoff band. The captain and I both agreed that it did appear to be within the green band, although not set at the required position as shown by the release. The stabilizer was trimmed forward and we taxied back and completed the before takeoff checklist again. A normal takeoff then followed. To prevent this from happening again from a first officer's position, I need to also verify the proper switch position as I read the checklist, not just listen for and accept the proper response.

Original NASA ASRS Text

Title: A B737-300 CREW HAD THE TKOF WARNING HORN SOUND AS TKOF THRUST WAS APPLIED FOR TKOF.

Narrative: ALL CHKLISTS AND PROCS WERE FOLLOWED AND COMPLETED WITH POLICY. THE CHKLISTS WERE READ AND THE PROPER RESPONSE WAS GIVEN. UPON APPLICATION OF PWR FOR TKOF, THE TKOF WARNING HORN SOUNDED. WE EXITED THE RWY WHERE THE STABILIZER TRIM WAS DISCOVERED TO BE SET TOWARDS THE AFT END OF THE TKOF BAND. THE CAPT AND I BOTH AGREED THAT IT DID APPEAR TO BE WITHIN THE GREEN BAND, ALTHOUGH NOT SET AT THE REQUIRED POS AS SHOWN BY THE RELEASE. THE STABILIZER WAS TRIMMED FORWARD AND WE TAXIED BACK AND COMPLETED THE BEFORE TKOF CHKLIST AGAIN. A NORMAL TKOF THEN FOLLOWED. TO PREVENT THIS FROM HAPPENING AGAIN FROM A FO'S POS, I NEED TO ALSO VERIFY THE PROPER SWITCH POS AS I READ THE CHKLIST, NOT JUST LISTEN FOR AND ACCEPT THE PROPER RESPONSE.

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.