hammer wont return all the way

[Alpha88x@aol.com]

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Greetings,

           I was called to service a 5' Young Chang grand piano the other day 
which was abused at a party. One guy played the keys harshly while the other 
put his hand over top of the strings above the hammers. 

           Clearly, the delivery of the power from the key stroke was not 
allowed to flow in the manner for which it was designed, energizing the string 
properly (as the string was restrained by the "assisting" party of this mahem) 
and the energy recoiled back into the wippen. Now, the key when played softly, 
strikes the string, but does not fully return to rest on it's hammer pad. Key 
acts normal on mezzo-forte and forte blows. Also, I removed the action drawer 
and depressed the key while outside the piano, the key does not cause the 
hammer to have as much upward power (wont fly up as hard) as the other keys that 
are not affected. In other words the power stroke has lost it's 'umph'. 

             My guess is that the repetition spring was compressed/ slightly 
bent. I dont have a grand action model, which would be instrumental in solving 
this thing. Any suggestions? Thanks in advance.

Julia Gottchall,
Reading, PA  

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