Originally Posted by JJeffrey

There have been a few instances in the past months where AA inadvertently dumps a bunch of C space only to pull it minutes later. Usually happens during the late night inventory updates.

I'm guessing that's what happened here, not an EF glitch but rather the inventory was gone by the time you have the chance to call.

But if you are refreshing EF in real time while you call and still see the C space, but an agent can't see it, then definitely HUCA.

I just spot checked one of those flights mentioned above and not surprisingly it's back to C0.