Temp. disable Camera Boom / Spring Arm

I am using a camera attached via spring arm to my main actor to always follow that actor through the map. However, in some situations I want to temporarily disable that, instead move the camera to a certain (birds eye) point, where it should stay fixed for a while.

I guess I could use a second camera at that fixed birds eye view point and blend from my main cam to that 2nd cam. But I don’t want to blend, I want to move the main camera to that birds eye point, so that the player sees the camera moving from the main character to the top-down view.

Any ideas how I could achieve this via Blueprint?