Hi all Trim circuit breaker keeps popping. I have a 77J with electric trim and no autopilot servo for pitch.   The recent mx history is that the windshield was replaced and the glare shield was off for that.  It started happening soon thereafter.  Thinking about debris that may have fallen behind the CB panel but difficult to visualize from above or below .   I brought the plane to the MSC and had them look at it.  The trim jack screw was well lubed and not dirty.  The wheel