<< >> NASA ASRS Report 536689, January 2002

A B737-300 flight crew aborts their takeoff when the aircraft's confign takeoff warning horn alerts them to a zero flap position at tpa, fl.

Attributes
ACN	536689
Time
Date	200201
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : tpa.airport
State Reference	FL
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Dawn
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
Aircraft 2
Make Model Name	Commercial Fixed Wing
Flight Phase	ground : pushback ground other : under tow
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time total : 20000
ASRS Report	536689
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 15000 flight time type : 200
ASRS Report	536705
Events
Anomaly	aircraft equipment problem : critical conflict : ground less severe non adherence : published procedure non adherence : company policies non adherence : far other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : tkof confign wing other flight crewa other flight crewb
Resolutory Action	flight crew : rejected takeoff flight crew : became reoriented flight crew : overcame equipment problem other
Consequence	other
Supplementary
Problem Areas	Environmental Factor Flight Crew Human Performance Company Airport
Primary Problem	Flight Crew Human Performance

Narrative:

Low speed abort due to takeoff warning horn alert triggered due to flaps being in up position. The situation developed after pushback and being cleared to taxi. The after start checklist completed, I called for flaps 5 degrees and checklist. As I advanced power, we noticed an aircraft under tow coming from our right and the tug driver did not seem to see us. I turned aircraft away from aircraft under tow because there didn't appear to be enough room for both of us in the same slot. We called tower to let them know we were getting away from aircraft. After he reached the gate, we turned 180 degrees back toward our runway (runway 18R). At this point, the checklist was continued, but not from 'the top' -- my mistake. In the early morning at tpa there are several aircraft being towed into position at gates and it would probably help if towing aircraft would wait until aircraft on pushback cleared gate area before towing in to gate. The conflict we had, contributed to interrupting checklist. I did see the value of starting checklist from the top when a distraction interrupts checklist. After getting the takeoff warning horn, we did rejected takeoff and cleared the runway. Reset flaps and did the checklist from 'the top.'

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Original NASA ASRS Text

Title: A B737-300 FLC ABORTS THEIR TKOF WHEN THE ACFT'S CONFIGN TKOF WARNING HORN ALERTS THEM TO A ZERO FLAP POS AT TPA, FL.

Narrative: LOW SPD ABORT DUE TO TKOF WARNING HORN ALERT TRIGGERED DUE TO FLAPS BEING IN UP POS. THE SIT DEVELOPED AFTER PUSHBACK AND BEING CLRED TO TAXI. THE AFTER START CHKLIST COMPLETED, I CALLED FOR FLAPS 5 DEGS AND CHKLIST. AS I ADVANCED PWR, WE NOTICED AN ACFT UNDER TOW COMING FROM OUR R AND THE TUG DRIVER DID NOT SEEM TO SEE US. I TURNED ACFT AWAY FROM ACFT UNDER TOW BECAUSE THERE DIDN'T APPEAR TO BE ENOUGH ROOM FOR BOTH OF US IN THE SAME SLOT. WE CALLED TWR TO LET THEM KNOW WE WERE GETTING AWAY FROM ACFT. AFTER HE REACHED THE GATE, WE TURNED 180 DEGS BACK TOWARD OUR RWY (RWY 18R). AT THIS POINT, THE CHKLIST WAS CONTINUED, BUT NOT FROM 'THE TOP' -- MY MISTAKE. IN THE EARLY MORNING AT TPA THERE ARE SEVERAL ACFT BEING TOWED INTO POS AT GATES AND IT WOULD PROBABLY HELP IF TOWING ACFT WOULD WAIT UNTIL ACFT ON PUSHBACK CLRED GATE AREA BEFORE TOWING IN TO GATE. THE CONFLICT WE HAD, CONTRIBUTED TO INTERRUPTING CHKLIST. I DID SEE THE VALUE OF STARTING CHKLIST FROM THE TOP WHEN A DISTR INTERRUPTS CHKLIST. AFTER GETTING THE TKOF WARNING HORN, WE DID REJECTED TKOF AND CLRED THE RWY. RESET FLAPS AND DID THE CHKLIST FROM 'THE TOP.'

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.