Hello, I have a doubt with the COST INDEX B737NGX, that I can not solve.
The Cost Index is 20-25 standard for B737, but when I set up the aircraft with a weight (about 125.000Lb Gw) and put the Cost Index of 25, the field TRIP gets a very low altitude.
I believe this is not normal. Something is wrong, but I do not know what it is.
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I appreciate the help.