Master Caution when AP disengaged

[avi8tir 24]

I've been putting up with it since I bought the plane.... but how do I fix this? 

When on approach, I disenage the AP but the master caution goes off and will not stop even after pressing the MC button. cannot figure this out! MC will stay on through the rollout 

 

Thanks!

[PMDG777 231]

1 hour ago, avi8tir said:

I've been putting up with it since I bought the plane.... but how do I fix this? 

When on approach, I disenage the AP but the master caution goes off and will not stop even after pressing the MC button. cannot figure this out! MC will stay on through the rollout 

 

Thanks!

How are you disconnecting the autopilot?

FYI - PMDG require you to sign all posts with your full name.

[scandinavian13 5,192]

1 hour ago, avi8tir said:

When on approach, I disenage the AP but the master caution goes off and will not stop even after pressing the MC button. cannot figure this out! MC will stay on through the rollout 

Make sure to read the Intro Manual, as this is one of the "common mistake" items discussed, and the correct procedure is provided.

As Chris noted, please ensure that you include your name in your posts.