We had the cabin door open in descent at approximately 175 mph. Prior to it opening there was a bit of turbulence and a single bumping sound! About 3-5 seconds later the door swung open about 2-3 feet and oscillated back and forth violently !
I’m fairly experienced but still my first reaction was to reach for the door!
The drag/partial stall caused the aircraft to roll rapidly right and pitch down ..,
I closed the throttle and the door stopped swinging and just stayed open about 3-4”.
I climbed to slow to 100 mph then as I was close to the airport I continued at that speed and left it open and landed without incident.
(The prop blast caused the door to swing open and the airflow over the wing swung it back this cycled violently until I closed the throttle!)
I think the emergency recall for a Mooney door opening in flight should be “Maintain control and reduce power immediately” then checklist etc !
