There are many CS-36T's that have both crossed the pond/ponds and many that have been around the world such as ours. I have to suspect that the "repairs" were not done well. The first rudder failed by hitting a submerged object. This is the only 36T I can come up with that has lost a rudder.

The second rudder (a repair) had the welds fail most likely due to poor workmanship...

This is a direct response from Jim about the first rudder failure:

"The first incident happened between Portugal and Madeira. We hit a submerged object that took out a fist sized chunk of the keel, hit the rudder, and tore of the towline and prop of my towed electrical generator. The cracking noise that I heard, I put off to the shear pin on the towed generator as I had not lost any steering control at this time. It is designed to break at 300lbs of pressure, and the manual does say that it has been know for sharks to take these. This happened mid afternoon.

Later that evening there was a strong gust of wind, heeling the boat over, which put pressure on the rudder , loosening it from the post. The rudder did not fall off till 02:00, these things always happen in the dark. I can assure you that the whole rudder was gone, there was no "emergency stub".

We had a new rudder built in Madeira and yes that one failed as well, I was told that the welds on the new stainless steel frame that was built were faulty, and when pressure was put on the rudder, after being back winded, it failed leaving the rudder hanging horizontally , causing the boat to go into 3 uncontrolled gybes, breaking the boom in half. However when this one broke, I did have an "emergency stub" left to steer with. I am presently in Mindelo in the Cape Verde islands off the coast of Africa, where my new rudder was installed yesterday, and I go back in the water today.
cheers Jim."