Does the Dash 8 have any limitation to climb/descend Single Engine with the autopilot engaged? How about changing direction? I highly doubt it, so what is the difference in descending in VS mode and HDG mode on a non precision approach? You are just using the flight director as you would in any othe...

Talking to a buddy just training on the Dash 8. Tells me that the autopilot can not be coupled on a single engine approach. WTF? Isn't that when the workload/stress would be little higher? Is that a certification thing like a lack of auto rudder trim? Or maybe is the manufacturer afraid of American ...