Narrative:

Received 'position and hold' from tower at ord. As we crossed hold short we received 'cleared for takeoff.' at that time a revised load closeout came up on ACARS printer. This required resetting our trim, thumb wheel and rechking for legality. We ended up delaying on runway for 15-20 seconds while we performed these checks. Did not tell tower because we both fixated on making required changes. Recommendations and observations: I should have informed ord tower of delay. Contributing factor is that airline sent incorrect load information which required a subsequent correction during a critical phase of flight.

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Original NASA ASRS Text

Title: ACR MLG DELAYS TKOF AS ACARS INFORMATION ARRIVES FOR AMENDED TKOF DATA JUST AS ACFT ENTERS RWY 27R AT ORD.

Narrative: RECEIVED 'POS AND HOLD' FROM TWR AT ORD. AS WE CROSSED HOLD SHORT WE RECEIVED 'CLRED FOR TKOF.' AT THAT TIME A REVISED LOAD CLOSEOUT CAME UP ON ACARS PRINTER. THIS REQUIRED RESETTING OUR TRIM, THUMB WHEEL AND RECHKING FOR LEGALITY. WE ENDED UP DELAYING ON RWY FOR 15-20 SECS WHILE WE PERFORMED THESE CHKS. DID NOT TELL TWR BECAUSE WE BOTH FIXATED ON MAKING REQUIRED CHANGES. RECOMMENDATIONS AND OBSERVATIONS: I SHOULD HAVE INFORMED ORD TWR OF DELAY. CONTRIBUTING FACTOR IS THAT AIRLINE SENT INCORRECT LOAD INFO WHICH REQUIRED A SUBSEQUENT CORRECTION DURING A CRITICAL PHASE OF FLT.

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.