it kinda looks like it broke where the hinge is installed which makes sense since that is where a stress riser would be.  So a hole in an unfortuanely picked piece of balsa and snap, broke at the weak spot.  Probably just bad luck.  </p>

Honestly, I would just re-do that side of thr elevator and not bother calling GP, after all whats the best outcome for that?  They give you a new piece and its actually more work installing the new piece than it is fixing it withou the free piece right?</p>

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Good luck (nice job landing it by the way)</p>