Don't mix AB and Boeing data!!!
Hola!
Maybe I'm still a bit addled from muscle relaxant...but what did you? It sounds to me that you used the numbers for Full Thrust with Bleeds Off even though you were at a lighter weight and used reduced thrust. Is this correct?
NEVER TRY TO USE AB DATA FOR A BOEING AIRCRAFT OR VICE VERSA!!!!!! Why? Several good reasons, first none of the data is correct (lift, drag, etc.) and second both manufacturers use very different techniques and procedures for their calculations.
Best wishes to all,
Jon