Actually Funked, they notified us all that NONE of the transport aircraft are certified for the stop-to-stop rudder reversal. We've been warned that it's possible to snap the fin off of anything if you do one or more stop-to-stop reversals.
We all just think it's kinda funny that in the 50 odd years of swept wing jets with powered rudders it hasn't happened before if that is truly the case.
That's an awful lot of flight hours, an awful lot of unusual flight conditions, unusual pilot techniques
but not other recorded failures.
All those old low-tech aluminum vert stabs/rudders stayed on. I don't think I've even heard of separation in the 737 "hard-over" crashes.
I could also tell you the story about a functional check flight on a 727 in the wee hours where part of the check is to turn off the yaw dampers at altitude and put it in a dutch roll with a sharp rudder input. The "Skipper"
had us going in excess of 60 degrees of bank on the dutch roll swings and then slapped on a yaw damper right at max bank. It popped right to wings level instantly.
The mechanic watching the FCF made the comment "I'm amazed the T-tail stayed on!" The F/O said "Jeez, please don't do that again!" The S/O said "I don't think that's too good for the tail!"
So the Skipper did it again.... just to show us what wimps we were.this time around 80 degrees of bank on the swings. T-tail stayed on. The Skipper left our employment shortly thereafter.
I like Boeings. 
Especially 727's because they are built like anvils.
