Hello there,
4-4 has nothing to do with 1st segment or 2nd.
It purely deals with obstacle.
When optimizing, Most of the time MTOW is obtained at the intersection of two limiting factors hence the two numbers.for example if limited by 2nd seg and obst we get code 2-4.
but if the limiting factor is only one as in your question then the number is just repeated;4-4
have a look at "Getting to grips with perfomance" Appendix2 2.4.3 limitation codes.
