The CI put into the FM is not the airline CI, there is a graph/formula used to convert the airline CI to the airframe CI. The CI value to use in the FM changes based upon airframe, FM, and engines. An airframe CI of around 50 is only an airline CI of around 10, that is MRC, not LRC. Airline CI of 0 represents a FM CI of around 35 +/-5.
I never knew that! Learn something new every day. Cheers, SWH
