Narrative:

Shortly after takeoff; the operations person advised that he needed to revise our ZFW. He advised us that our ZFW was two thousand pounds too low. He gave us the corrected ZFW and takeoff weight and we put it into the computer and the FMC. He said that he had failed to add in the freight and the bags put in the cargo bins. I didn't notice any difference in the way the aircraft flew since the weight was such a small number. In the future; maybe we can modify the electronic load sheet so the operations people would have to physically add in any number to get the computer to accept the numbers and calculate the load sheet. If there was not anything put into those areas; it could give an 'incomplete' loading document signal to the operations person to remind them to put the correct numbers in. Our FMC gives us that kind of message if we do not fill in all the information when setting it up for departure.

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Original NASA ASRS Text

Title: FLT CREW OF B737-300 REPORT RECEIVING REVISED TKOF WTS INDICATING AN INCREASE OF 2000 LBS IN THE ZERO FUEL WT AFTER TKOF ALREADY COMPLETE.

Narrative: SHORTLY AFTER TKOF; THE OPS PERSON ADVISED THAT HE NEEDED TO REVISE OUR ZFW. HE ADVISED US THAT OUR ZFW WAS TWO THOUSAND POUNDS TOO LOW. HE GAVE US THE CORRECTED ZFW AND TKOF WT AND WE PUT IT INTO THE COMPUTER AND THE FMC. HE SAID THAT HE HAD FAILED TO ADD IN THE FREIGHT AND THE BAGS PUT IN THE CARGO BINS. I DIDN'T NOTICE ANY DIFFERENCE IN THE WAY THE ACFT FLEW SINCE THE WT WAS SUCH A SMALL NUMBER. IN THE FUTURE; MAYBE WE CAN MODIFY THE ELECTRONIC LOAD SHEET SO THE OPS PEOPLE WOULD HAVE TO PHYSICALLY ADD IN ANY NUMBER TO GET THE COMPUTER TO ACCEPT THE NUMBERS AND CALCULATE THE LOAD SHEET. IF THERE WAS NOT ANYTHING PUT INTO THOSE AREAS; IT COULD GIVE AN 'INCOMPLETE' LOADING DOCUMENT SIGNAL TO THE OPS PERSON TO REMIND THEM TO PUT THE CORRECT NUMBERS IN. OUR FMC GIVES US THAT KIND OF MESSAGE IF WE DO NOT FILL IN ALL THE INFO WHEN SETTING IT UP FOR DEP.

Data retrieved from NASA's ASRS site as of January 2009 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.