Optimum Cruise Altitude

[Vladtop 0]

Hello! I have one more question. Before I asked about approach attitude. Now I have to note my observations for Optimum cruise altitude. So, flight URSS-DAAG. Boeing 737-800. Abt 1800 NM. 17 tonns of fuel, 4 tonns of cargo and 147 passangers.Gross Weight = 74.0 tonns : Ok. TSO914 climbing FL360... Reached FL360. Optimum altitude and TAT: Gross weight: FCOM: [ Difference is 1800 ft - too mach. Who is wrong? Please check it.

[MrKen 3]

Is that table for a 738 with or without winglets? That could be the difference you're seeing

[Vladtop 0]

Is that table for a 738 with or without winglets? That could be the difference you're seeing

Are you shore? Almost 2000 feet?

[tri_tro 0]

Maybe im wrong but could it be because the cost index is so high?

[Vladtop 0]

Maybe im wrong but could it be because the cost index is so high?

Low dependence.

[jalexb88 7]

Have you tried pressing the LRC button on the crz page and check those numbers, because thats ECON cruise on the fmc you have there and the table is Long Range Cruise.

[Vladtop 0]

Have you tried pressing the LRC button on the crz page and check those numbers, because thats ECON cruise on the fmc you have there and the table is Long Range Cruise.

I have pressed.

[tcas_climb 45]

are u sure its long range cruise? because if the FMC was in LRC mode, then it should show ECON in pic number 2 abeam the 6L line select key