Narrative:

Initial delay in obtaining final weights; lost our takeoff slot because of delay. When we finally received the weights we took off uneventfully. About 10 minutes after takeoff we received an ACARS message saying 'ramp has advised me they need to correct their final loading figures; please stand by for revised weights.' a few minutes later we received a revised manifest that was significantly different than the one we used for takeoff. This is a safety concern because we departed with incorrect data. We later received another ACARS stating 'plz use #2 manifest due to adj tks.' we used the revised numbers for landing obviously but it was too late for the takeoff. How can ramp send out incorrect data about aircraft loading? This problem needs to be addressed before it causes an accident.

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Original NASA ASRS Text

Title: B757 FLT CREW RECEIVES REVISED WT AND BALANCE DATA WELL AFTER TKOF IS COMPLETE.

Narrative: INITIAL DELAY IN OBTAINING FINAL WTS; LOST OUR TKOF SLOT BECAUSE OF DELAY. WHEN WE FINALLY RECEIVED THE WTS WE TOOK OFF UNEVENTFULLY. ABOUT 10 MINUTES AFTER TKOF WE RECEIVED AN ACARS MESSAGE SAYING 'RAMP HAS ADVISED ME THEY NEED TO CORRECT THEIR FINAL LOADING FIGURES; PLEASE STAND BY FOR REVISED WEIGHTS.' A FEW MINUTES LATER WE RECEIVED A REVISED MANIFEST THAT WAS SIGNIFICANTLY DIFFERENT THAN THE ONE WE USED FOR TKOF. THIS IS A SAFETY CONCERN BECAUSE WE DEPARTED WITH INCORRECT DATA. WE LATER RECEIVED ANOTHER ACARS STATING 'PLZ USE #2 MANIFEST DUE TO ADJ TKS.' WE USED THE REVISED NUMBERS FOR LNDG OBVIOUSLY BUT IT WAS TOO LATE FOR THE TKOF. HOW CAN RAMP SEND OUT INCORRECT DATA ABOUT ACFT LOADING? THIS PROB NEEDS TO BE ADDRESSED BEFORE IT CAUSES AN ACCIDENT.

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.