hidden damage question

[Tunethepno@AOL.COM]

List,
    A church, for which I tune, had some night visitors last Friday. Instead 
of just stealing the sound system, which they did, they decided to vent 
something deep inside. They ripped all the keys out of the organ and dumped 
it over. Then they went to the piano, a middle aged 5' Knabe grand, and 
reached inside and twisted the dampers into a mess. Feeling that they were 
not doing justice to the piano, they dumped it over upside down. Aside from 
the case damage and the dampers, it didn't appear too bad. The tuning was 
about normal for the six months that have passed since the last one, the 
action seemed to be functioning normally, the frame wasn't cracked, and I 
couldn't find anything loose are damaged with the soundboard.
    I was wondering if the impact of landing upside down might cause some 
damage that would show up later on. Would the strings be weakened at the 
pressure points?  Would the pinblock be loosened from the frame? Might the 
soundboard develop some type of stress damage?  Just wondering. Has anybody 
had experience with this kind of thing?
    Thanks,
        John Stroup