Hi all,
For Boeing series - Just want to verify when prior to Top of Descent you need to manually initiate it by setting a lower altitude in MCP and then pushing the ALT button when T/D is reached ? I thought in VNAV PATH if T/D is reached and the altitude of next fix is input the A/P will automatically follow VNAV profile all the way down but I found this isn’t the case I had to manually initiate it- having said that I did modify the cruise altitude — so I am wondering if that causes an issue with the FMS and it won’t descend because it messes up the computations and this only works if cruise altitude is not modified?