Originally Posted by
Denti
If i recall correctly there was a difference in trim settings depending on chosen flap setting. Do you tell your loadsheet provider which flap setting you use? The OPT can chose the optimal flap setting for you as far as i know. The software we used before the OPT certainly did, so we knew which flap setting we were going to use only after the final performance calculation was done.
Our loadsheets cover all flap settings. There's a trim setting for 26K Flap 1-5, then another from 10-25 (from memory there's only two divisions), and then the same for 24K. This is then compared to the FMC generated stab trim. All our SOP say is to "check for reasonableness".
It's rare to see it more than 0.1 units out, but near impossible to trim to that accuracy anyway.