Broken Action Bracket

[bwaller@sunrise.alpinet.net]

I service a Kawai K5-3F in a high school.  Last summer I spent the better
part of 10 hours filing and voicing and regulating etc.

The piano was recently "upset" on it's front by a faculty member.  To his
credit, he cleaned up his mess.

As I played and tuned I discovered that there were quite a few bobbling
(bob-o-link) hammers which I'm sure were not there when I left it a year ago.

Close inspection revealed that the middle action bracket (there are 3) had
broken in the center and had a gap of about 1/16" between the parts.

The questions I have are:

Although I'm sure that the broken bracket is contributing to the bobbling
hammers, what are the physics that confirm it?  ie. the aluminum action rail
is not firmly supported or was slightly bent in the upset.

Could I be lucky enough to just replace the action bracket and touch up the
regulation?  Or are there other problems that I should look for?

Thanks

Bruce
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