Thank you all for your replies. Tom's treatise on reinforcement was
well-taken on this end and is something I am going to try in the future.

The opinion seems to be that Super Glue has not really changed but that
plastics have changed into a form not as easily repaired by Super Glue.
However, judging from the way Super Glue used to bond my skin vs. how much
less so now, I still suspect that a weakening of the formula may have taken
place, perhaps in response to a lawsuit by someone who accidentally glued
the palm of their hand to the sole of their shoe or something ridiculous
like that. Lawyers are continually ruining products and processes for the
rest of us as they search for the next target from which to extract punitive
damages.

By the way, I never said what kind of failure it was; someone else assumed a
fan blade had cracked. Actually, it was one of the supporting struts that
had cracked. I am fairly confident that with some reinforcement a crack like
this one has a very good chance of being repaired. However, I believe epoxy
is better indicated in this particular case as one of the posters pointed
out. Epoxy is one tough glue.

Thanks again.

Al