To Framer: if you cannot fly Alt HLD in turbulence, you assume an Operational FMS is mandatory?
You can fly ALT HOLD in turbulence. I was referring to severe turbulence as the poster before me had been referring to the 744 procedure for severe turb. Apologies if I mislead you. I'm not sure what the reference to the FMS is about, I don't assume an operational FMS is mandatory, I'm not sure why you'd think that.
Have a good day, Framer