Rotate camera on springarm without the springarm moving

Hi. I have a FPS. My goal is to have an input that expands a spring arm relative to the camera direction. Once the spring arm is finished expanding the camera needs to rotate freely under player control without moving the pawn or the spring arm. After the input is cancelled the spring arm retracts and the camera is fixed to the pawn rotation again.

I have the spring arm part working but I can not break the camera/pawn rotation.