WT MANIFEST PROB REGARDING THE ACTUAL FUEL ON BOARD.

Narrative

AFTER 2 MONTH OF OBSERVATION; OVER 80 PERCENT OF MY FINAL LOAD CLOSEOUTS USED PROPOSED FUEL WT AND NOT THE ACTUAL FUEL WT. ON EVERY FLT; THE ACTUAL FUEL WT WAS SENT 15-20 MINS PRIOR TO DEP. AT TIMES; THERE HAS BEEN A 2000 LBS FUEL DISCREPANCY WHICH IS THEREFORE UNACCOUNTED FOR BY DISPATCH. IS DISPATCH SENDING AN EARLY LOAD CLOSEOUT BY USING PROPOSED FUEL VERSUS ACTUAL FUEL? IS THIS BECOMING A COMMON PRACTICE TO CLR FLTS EARLY? I WOULD LIKE TO KNOW IF THIS IS A NEW PRACTICE AND RELEVANT TO ALL FLEET TYPES. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR FLIES FOR A MAJOR UNITED STATES ACR THAT USES ACARS FOR MOST OF ITS FLT TIME AND FLC DISPATCH MESSAGE FUNCTIONS. PART OF THE PREFLT PROC IS TO COMPARE THE 'ACTUAL' FUEL ON BOARD WITH THE 'PROPOSED' FUEL ON BOARD AND THEN ENTER THE 'ACTUAL' FUEL ON BOARD INTO THE ACARS. THIS INFO IS NOT SENT TO THE CENTRAL LOAD OFFICE UNTIL THE ACFT PUSHES AWAY FROM THE GATE IN THE 'OUT' EVENT. THE LOAD CTR THEN SENDS THE ACFT A MESSAGE LISTING ALL WTS AND THE FINAL LOAD CLOSEOUT. AS CREWS ARE NOT ALLOWED TO LEAVE THE GATE WITH LESS THAN THE 'PROPOSED' FUEL WITHOUT A CALL TO DISPATCH; EXCESS FUEL IS OF NO CONCERN UNLESS THE ACFT IS NEAR MAX GROSS TKOF WT; MAX RAMP WT; OR MAX ZERO FUEL WT. THE ACFT HAS INSTITUTED A PROC; IN RESPONSE TO THIS RPTR'S CONCERN; THAT REQUIRED THE FLCS TO NOTIFY LOAD CTL WHEN ANY OF THE ABOVE MENTIONED MAX WTS ARE ENCOUNTERED. A CHANGE IN THE ACARS SOFTWARE IS PROPOSED THAT WILL SEND THE ACTUAL FUEL LOAD TO LOAD CTL BEFORE THE 'OUT' EVENT.