Colgan Q400 accident:
Any q400 drivers here? The initial stick shaker activation was the result of the lately applied power after landing gear extension.
The nose was kept up until the the plane really stalled and the nose went down .
There's a switch called "increase ref speed"-this shall be switched on as you encounter icing and switch on the boots. In this case the red bar will come up with 20 knots on the speed tape. That means the stick shaker will be on at a speed 20 knots faster than usual, in order to simulate the degraded performance of the wings due to ice/boot operation.
They were tired-speed dropped-switch was on-speed approached the top of the red bar much quicker than usual-stick shaker on-confusion.
Flap retraction during the stalled condition-they thought about? tailplane icing?-speculation-but if you look at the NASA video on tailplane icing that's exactly what it says. (and it starts with:tailplane icing is an issue with light planes and turboprops-and not planes with hyd actuated elevators).