Yesterday on approach to KASE over KEGE (14 000 ft, speed 150-200 KIAS) I experienced that the nose on the Dash started to pitch up and down. I tried to adjust trim, speed and flaps, but no change.
On base rwy 15 when I disconnected AP, everything returned to normal.
This is not the first time I fly the Q400.
What did I do wrong this time?
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