A B757 FLC DEPARTS THE ARPT BEFORE RECEIVING THEIR REVISED LOAD CLOSEOUT AFTER HAVING REMOVED CARGO TO SATISFY THE ACFT'S ZERO FUEL WT FOR A TKOF WITH A PROBLEMATIC DENSITY ALT AT SEQU; FO.

Narrative

SOUTH AMERICAN QUALIFIED FO ON THE B757/767 WITH 3+ YRS OF EXPERIENCE. FAMILIAR WITH THE INTENSIVE AND CRITICAL NATURE OF FLYING INTO/OUT QUITO; ECUADOR. THE DATA WAS PLANNED FOR 14 DEGS C. WE ALSO HAD A COPY OF DATA FOR 15 DEGS. BEFORE WE PUSHED BACK FOR ENG START; WE RECEIVED THE LOAD CLOSEOUT AND WERE WITHIN THE LEGAL PARAMETERS. WE WERE GIVEN THE WX AND CLRNC TO PUSH AND WERE NOW TOO HVY DUE TO THE INCREASED TEMP FO 15 DEGS. THE RWY AND CLB LIMITS WERE TOO HVY; SO WE HAD THE TOTAL AMOUNT OF FREIGHT REMOVED (816 LBS) TO BRING US BACK INTO PARAMETERS. THIS ALLOWED THE COMPANY WT AND BAL SYS TO PRODUCE THE TKOF DATA FOR 15 DEGS; WHICH HAD BEEN BLOCKED BEFORE DUE TO A HIGHER ZERO FUEL WT. THE TWR FORECAST THAT THE TEMP WOULD NOT RISE TO 16 DEGS FOR AT LEAST 45 MINS. ARMED WITH THIS KNOWLEDGE; A NEW TKOF DATA FOR 15 DEGS AND NEW COMPUTED ZERO FUEL WT; WE CALLED FOR TAXI AND PUSH. THE TAXI OUT FOR RWY 35 IS SHORT AND WE PLANNED FOR A SLOW TAXI AND INCREASED FUEL BURN OF 500 LBS IN THE TAXI TO MAINTAIN OUR TKOF PLAN WT LIMITS. WE ENTERED THE NEW ZERO FUEL WT FROM THE NEW TKOF PLAN IN ANTICIPATION OF THE NEW LOAD CLOSEOUT WHICH WOULD REFLECT THIS SAME ZERO FUEL WT. WE REQUESTED THE NEW LOAD CLOSEOUT VIA ACARS AND RECEIVED CONFIRMATION THAT OUR REQUEST WAS BEING PROCESSED. THE TAXI CHKLIST WAS COMPLETED AS WE WAITED FOR 1 TKOF AND 2 ARRS. WE DISCUSSED THE REQUIREMENTS FOR THE TKOF AND MAX PWR; BLEEDS OFF; AND APU OPERATING AND THEN REVIEWED SPECIAL DEP PROCS FOR THIS HIGH ALT ARPT. THE TWR CLRED US INTO POS AND HOLD FOR ABOUT 1-2 MINS AS WE COMPLETED THE ITEMS ON THE TKOF CHKLIST. THE TKOF ROLL; ROTATION AND DEP WERE FLOWN AS PLANNED. ABOUT 6 OR 7 MINS AFTER TKOF; PASSING FL250; WE RECEIVED THE REVISED LOAD CLOSEOUT. I REALIZED THEN THAT WE HAD ALL THE CORRECT INFO IN THE FMC AND WERE IN SAFE PARAMETERS; BUT HAD NOT CONFIRMED THE WHOLE OP OF REVISED WT AND BAL WITH THE REVISED LOAD CLOSEOUT THAT IS REQUIRED PRIOR TO DEP. AFTER RECEIVING THE REVISED LOAD CLOSEOUT; WE CAREFULLY REVIEWED THE DATA AND IT CONFIRMED WE WERE IN LIMITS FOR TKOF. SUPPLEMENTAL INFO FROM ACN 536245: I FORGOT TO CHK FOR IT. WHEN WE DID THE CHKLIST ITEM COVERING IT; WE ERRED IN COMPLETING THAT ITEM WITHOUT THE LOAD CLOSEOUT. THE NEW ZERO FUEL WT HAD BEEN ENTERED INTO THE SYS; BUT IT WASN'T LEGAL. IT WAS SAFE. THIS IS A STATEMENT THAT THE ACTUAL TKOF WAS NOT IN JEOPARDY. THE REVISED CLOSEOUT RECEIVED AFTER TKOF CONFIRMED ALL OF THIS.