mavic Pro just fell out of sky from around 15- 20 feet . happened the second time.

[DanMan32]

Make sure your settings for propeller shutdown is set to "Emergency", otherwise you may be turning off the propellers by holding the joysticks down and in, mistakenly.. Happened to me..

Even without CSC shutdown response, stick position like that will cause crazy maneuvers.
Decline altitude, yaw right or left, fly backwards, fly left or right, all at the same time as fast as possible.

 

[Ctrlx]

The method utilized to secure the props is a good and proven design. This type of problem is sooooooo rare that "Pilot Error" is implied. Take a good look at your pre-flight routine and verify it against the fact that the props differ as to which way they are turned to complete the "lock". This lock is spring-loaded to prevent casual unlock. This is not a design flaw, but a user flaw.

Agreed, it is a proven design and steps are also in place that does not allow you to attach the wrong prop to the wrong motor. As I stated in an earlier post: While grasping the motor housing and installing the prop, there is a positive "click" when the prop is properly locked in place. So unfortunately the only conclusion is user oversight/error.