Both my and my wife's Aviator were recently shut down while we were traveling abroad. We hit both cards extremely hard for the 13 months we had it and paid by various instruments including mailed in MOs and CFP BP. Both cards were above $20k CL each and we cycled it 2-3x every month.
HUCA a few times but only managed to have them waived the annual fees. Couldn't even get a reasonable explanation why the accounts were closed. Beyond losing the CLs, we weren't too upset about this as we just burned most of our AA miles and moved our currency to something else.
Oh well.