For what its worth I bought one (20"AK)off the website brand new and cracked the handle large enough to slip a quarter into and a few pieces almost fell off. You could see the tang through the crack. I could have redeemed the warranty but it was no fault of the QA inspector. It was a weak spot in the natural material that couldn't be found with the eye. I glued it back together with wood glue clamped it all back together and have been beating the snot out of it for two years plus now and not a sign of a problem. A proper glue joint will sometimes be stronger than the surrounding wood itself. CA repairs I personally dont have much confidence in especially when shock is involved.
see if you can find it
Most of the time you can tap around on the handle and feel if its solid. If you feel a rattle while chopping or a thud sound you might have a problem and need to pump it up with glue. To answer your question I have NEVER had a BLEM fail on me though.