A B737 aborts its takeoff 3 different times at pdx, or.

Attributes
ACN	394630
Time
Date	199802
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : pdx
State Reference	OR
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 17000 flight time type : 8000
ASRS Report	394630
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : rejected takeoff other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Pdx flight abc, XX00Z. We were cleared for takeoff with autothrottle armed and rejected takeoff engaged. Upon activating the takeoff/go around switches, the confign warning horn sounded. We accomplished a rapid check of the takeoff criteria and found everything in order. The takeoff was aborted at 55 KTS. We advised the tower and exited the runway. The flaps were recycled and the intransit and overhead displays were checked. Everything was normal. We were then again cleared for takeoff with the autothrottles armed and rejected takeoff engaged. This time as we armed the takeoff/go around switches, no aural warning was heard, but the autothrottle system failed with the green armed light still illuminated and the toggle switch remaining engaged in the armed position. We considered manual power setting, but it was a wet runway and we'd used up some available distance during the initial throttle advancement. We then elected to return to the gate to obtain a dpi for the autothrottles. XX25Z, we again pushed back and returned to the runway for takeoff. While manually advancing the throttles, the confign warning horn again sounded. We exited the runway and elected to return to the gate for a thorough confign warning check.

Original NASA ASRS Text

Title: A B737 ABORTS ITS TKOF 3 DIFFERENT TIMES AT PDX, OR.

Narrative: PDX FLT ABC, XX00Z. WE WERE CLRED FOR TKOF WITH AUTOTHROTTLE ARMED AND REJECTED TKOF ENGAGED. UPON ACTIVATING THE TKOF/GAR SWITCHES, THE CONFIGN WARNING HORN SOUNDED. WE ACCOMPLISHED A RAPID CHK OF THE TKOF CRITERIA AND FOUND EVERYTHING IN ORDER. THE TKOF WAS ABORTED AT 55 KTS. WE ADVISED THE TWR AND EXITED THE RWY. THE FLAPS WERE RECYCLED AND THE INTRANSIT AND OVERHEAD DISPLAYS WERE CHKED. EVERYTHING WAS NORMAL. WE WERE THEN AGAIN CLRED FOR TKOF WITH THE AUTOTHROTTLES ARMED AND REJECTED TKOF ENGAGED. THIS TIME AS WE ARMED THE TKOF/GAR SWITCHES, NO AURAL WARNING WAS HEARD, BUT THE AUTOTHROTTLE SYS FAILED WITH THE GREEN ARMED LIGHT STILL ILLUMINATED AND THE TOGGLE SWITCH REMAINING ENGAGED IN THE ARMED POS. WE CONSIDERED MANUAL PWR SETTING, BUT IT WAS A WET RWY AND WE'D USED UP SOME AVAILABLE DISTANCE DURING THE INITIAL THROTTLE ADVANCEMENT. WE THEN ELECTED TO RETURN TO THE GATE TO OBTAIN A DPI FOR THE AUTOTHROTTLES. XX25Z, WE AGAIN PUSHED BACK AND RETURNED TO THE RWY FOR TKOF. WHILE MANUALLY ADVANCING THE THROTTLES, THE CONFIGN WARNING HORN AGAIN SOUNDED. WE EXITED THE RWY AND ELECTED TO RETURN TO THE GATE FOR A THOROUGH CONFIGN WARNING CHK.

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.