A319
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 210; Flight Crew Type 6603
Other / Unknown
Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Weight And Balance
Flight Crew Became Reoriented
Human Factors; Procedure
The flight plan Zero Fuel Weight (ZFW) was 119.3.During preflight our final weights up linked showing a 2;330 loss from the planned weights; ZFW 116;976.After push and engine start we received an 'INVALID WEIGHTS' notice followed shortly by new final weights with an increased ZFW; 117;360; which my First Officer manually loaded into the FMGC.  We got new Takeoff Data and departed.On approximately 15 nm final approach to ORD; we received a new Final Weight manifest with a ZFW of 119;266; an increase of 1;900lbs.  That is significant for an A319's takeoff and approach speeds! I input the new weights and we completed the approach and landing uneventfully.
We departed for ORD and received init data uplink with final weights prior to start. We then received message that weights were invalid. We then received new weights which were manually entered into FMGC due to the fact engines were now running. We departed for chicago and on final approach into ORD we received an ACARS message with new final weights which were different from the ones we departed with. The new weights were 1;900 pounds heavier than what we had entered. We changed the weights in the FMGC and had an uneventful landing.
Just prior to departure; an A319 flight receives a revised weights which are entered into the FMGC. During approach to ORD an ACARS message is received with new final weights; increasing Zero Fuel Weight (ZFW) by 1;900 pounds.