Slow reception and insertion of load information causes the reporter to leave the runway.

Attributes
ACN	310122
Time
Date	199507
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : dfw
State Reference	TX
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	ground : holding ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	310122
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance other other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

Taxied out to runway 18 in dfw and had a problem with the passenger count. Got that resolved and requested new load. Tower instructed us to go into position and hold as the data came up over ACARS. Traffic was to cross downfield and, since we were to follow a heavy 767, we figured we had enough time to enter the data in the different boxes. Not!! We had to taxi off the runway and get back in line because the takeoff data had changed too much and we had to recompute. Moral of the story is not to outguess the system and to only be ready for takeoff when you're ready.

Original NASA ASRS Text

Title: SLOW RECEPTION AND INSERTION OF LOAD INFO CAUSES THE RPTR TO LEAVE THE RWY.

Narrative: TAXIED OUT TO RWY 18 IN DFW AND HAD A PROB WITH THE PAX COUNT. GOT THAT RESOLVED AND REQUESTED NEW LOAD. TWR INSTRUCTED US TO GO INTO POS AND HOLD AS THE DATA CAME UP OVER ACARS. TFC WAS TO CROSS DOWNFIELD AND, SINCE WE WERE TO FOLLOW A HVY 767, WE FIGURED WE HAD ENOUGH TIME TO ENTER THE DATA IN THE DIFFERENT BOXES. NOT!! WE HAD TO TAXI OFF THE RWY AND GET BACK IN LINE BECAUSE THE TKOF DATA HAD CHANGED TOO MUCH AND WE HAD TO RECOMPUTE. MORAL OF THE STORY IS NOT TO OUTGUESS THE SYS AND TO ONLY BE READY FOR TKOF WHEN YOU'RE READY.

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.