From CWS P back to VNAV

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All,

Sometimes on climb my VNAV gets disengaged and switches to CWS P. Probably caused by my joystick (it is a bit noisy, I will play with CWS joystick dead zone later).

Nevertheless, when that happens, what is the correct procedure to switch back from CWS P to VNAV? Pushing the VNAV button doesn't work, or should it work? ... Maybe my joystick is interfering when I try to do this as I lean over my desk to enable VNAV on my GF MPC hardware?

Let me know.

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After extensive testing I would like to close this question. It was my joystick that was causing me all these problems. I have adjusted CWS joystick dead zone and everything works as expected.