it is not intended to be brazed, just inserted and held in by the brake bolt and perhaps a lucky interference fit
No, absolutely, definitely supposed to be brazed, and don't let anyone tell you otherwise.
It's a fairly standard Long Shen LC14:
Screen Shot 2013-10-02 at 10.13.47.png
I don't know of any crowns just held on by the brake bolt. The leverages at the crown, especially during braking, are immense, and Jorge was very lucky.
IIRC this type of failure was one of the reasons for manufacturers dropping the clamped crowns on MTB forks.
While all the clamped steerers did have flanges or circlips to retain them in the crown, it was a safety critical joint which could be messed with by the customer, unlike the press-fit, bonded or moulded new stuff, where the manufacturer has full control.
Anyway, it looks like daveplanetx is helping Jorge
, and I hope that PX at least look seriously into the possibility of a recall.
All the best,