It is repairable but at a cost that exceeds the pianos worth.
Just this week my piano tuner told me that he had just finished tuning a Challen upright for a client when suddenly he heard an extremely loud bang from the piano. It sounded as if someone had struck the piano with a sledge-hammer. Then a a few moments later there was another bang of similar magnitude from the piano. He said that the noise was so loud that it resounded through the house like a heavy door being slammed. The explanation for this was that the iron frame or plate of the piano had suddenly cracked and a fissure 3cm wide was visible along part of it. He said that this was the first time in many years of tuning pianos that this had happened just on completion of a tuning.The piano went completely out of tune, but, according to my tuner,it is possible to "stitch" the iron frame and repair the crack. This would however be a very expensive option and cost more than the value of most upright pianos. Kind regards,Robert.
A wooden pin block? Wow. That's an old piano or a really cheap one. Does it have a wooden frame, too?Oh, it's a spinet. Yeah, you just bought a real piano! Congrats! But it probably wouldn't look as elaborately decorated.
Yeah, but the spinet doesn't have a brass frame around the pin block, that's what I was referring to. So the pin block and the frame is made of wood and since the wood is cracked, so is the pin block.