Caeser Creek Soaring Club had a L-33 which was totaled due to a
crinkled boom. It happened when the pilot struck the tail boom during
landing after a PIO.

I saw the CCSC L-33 after this accident. The "crinkled" boom was a small
percentage of the damage sustained from what must have been a very hard landing
(more like a crash landing than a tail strike). The impact was so hard it
buckled the fuselage and root ribs due to the resulting flex in the wings.
This was an extremely hard impact that I doubt any glider could have survived
damage free.

Curt