For the ER there should be CofG correction to the load sheet value of the MACZFW based on fuel quantity. It's a graph in the Supplementary Procedures section of the FCOM or whatever your procedures manual might be called. It's mainly used to update your max cruise altitude with the changing CofG with fuel burn in the cruise. The calculated value is entered in the crz cg (line 4R) on the perf page.
Last edited by sorvad; 23rd March 2023 at 17:12.