Hi Paul, We had a Yamaha U-1F fall over on its side arms exactly as you describe when we moved the school of music. The dampers were all off the strings in the midsection and there was about one half inch of lost motion before jacks would touch the butts. For a startled moment I thought the worst, but then noticed that the hammer rest rail hinge pin had popped out of the action bracket. When I put it back, the regulation came back and the dampers all worked. In addition the piano was still in tune. I know it was a hard hit by the damage on the front and the testimony of witnesses but the piano was alright. Mike Jorgensen RPT Central Michigan University
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