Narrative:

Calculation error in computing the maximum takeoff gross weight with antiskid inoperative. The initial computation for runway 35L was accomplished by company operations prior to departing the gate. No data was computed for runway 35R by operations. Runway 35R is 500' longer than runway 35L. When checking the runway limit weights for the 2 runways at various flap settings, the weights for flaps 10 degrees were the same, and flaps 5 degrees, the weight for runway 35R is 100 pounds higher than runway 35L. When checking flaps 1 degree, it was assumed that runway 35R would be equal to or greater than runway 35L, since runway 35R is 500' longer than runway 35L and the flaps 5 degree maximum gross weight is 100 pounds more. However, the actual runway limit for runway 35R is 4000# less than runway 35L, which resulted in a maximum takeoff weight of 2700# less than actual gross weight when 11000 pounds is subtracted from the runway limit for inoperative antiskid.

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Original NASA ASRS Text

Title: ACR MLG MADE TKOF FROM DEN AT GROSS WEIGHT IN EXCESS OF RWY MAXIMUM. ACFT ANTI SKID WAS INOPERATIVE AND FLT CREW DID NOT COMPUTE THE CORRECTION AS INDICATED IN THEIR MINIMUM EQUIPMENT LIST. AN ACI WAS OBSERVING THE FLT.

Narrative: CALCULATION ERROR IN COMPUTING THE MAX TKOF GROSS WT WITH ANTISKID INOP. THE INITIAL COMPUTATION FOR RWY 35L WAS ACCOMPLISHED BY COMPANY OPS PRIOR TO DEPARTING THE GATE. NO DATA WAS COMPUTED FOR RWY 35R BY OPS. RWY 35R IS 500' LONGER THAN RWY 35L. WHEN CHKING THE RWY LIMIT WTS FOR THE 2 RWYS AT VARIOUS FLAP SETTINGS, THE WTS FOR FLAPS 10 DEGS WERE THE SAME, AND FLAPS 5 DEGS, THE WT FOR RWY 35R IS 100 LBS HIGHER THAN RWY 35L. WHEN CHKING FLAPS 1 DEG, IT WAS ASSUMED THAT RWY 35R WOULD BE EQUAL TO OR GREATER THAN RWY 35L, SINCE RWY 35R IS 500' LONGER THAN RWY 35L AND THE FLAPS 5 DEG MAX GROSS WT IS 100 LBS MORE. HOWEVER, THE ACTUAL RWY LIMIT FOR RWY 35R IS 4000# LESS THAN RWY 35L, WHICH RESULTED IN A MAX TKOF WT OF 2700# LESS THAN ACTUAL GROSS WT WHEN 11000 LBS IS SUBTRACTED FROM THE RWY LIMIT FOR INOP ANTISKID.

Data retrieved from NASA's ASRS site as of August 2007 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.