Originally Posted by
vilas
How many of us know why when heading is pulled CLB changes to OPCLB but DEC changes to present VS and not OPDES?
Hi Vilas.
I dunno. Please share the reason. If I had to guess: I would think to avoid unnecessary thrust variation. Turbine engines don't like thrust variation. And also it's safer I suppose.Going from ''DES'' to ''OP DES'' would possibly means going from -500/-1000 feet a minute to a much higher rate of descent as the engines would go to idle.