Hello IPACS, I'll use the B737-800 as an example; notice that it shows Mach 770, and depending on the route and cost index, just like on Airbus aircraft, the speed should also change, while on Boeing aircraft it's static for all flights. Whatever you want to do, if you studied it, you'd see that Cruzeiro is still missing a lot of things, like when you go to the CRZ page in FMC, you also have to go to the CRZ option in the engine. It always remains in the CLB, CLB 1, or 2 option when approaching; in real life, the engine also engages for GA. You would lose money studying and seeing how you would do it, but it would be cool if you could fix it. And with each flight and each different Cost Index, the Speed will be different. For now, thank you very much, IPACS family!!