"By 'repaired' you mean closing a fracture?"
Right, I haven't had many fracture but it was more than I expected. I've had some come apart (completely—shear off). One I recall fixing (replacing the reed) with a piece cut from a phosphor bronze shim several thou thick (I had various thicknesses). Replacing the reed was easy but voicing was a problem because p-bronze has different properties to the original. It was a long while ago so I can't remember exactly what I did but it worked—sort of. I eventually got it roughly in tune but it was a different volume to the others.
About two weeks ago I was up at my old family home for the first time in years and there are two harmoniums dating from the the mid to late 19th C. which I meant to fix years ago. The woodwork on one is particulary ornate and in excellent condition. They both have dead keys when I played them. Reckon I've some wok cut out for me. .