Originally Posted by
PilotCrusader
At one point Mesa did I believe. There were a few others.
I know block but there are different understandings of it.
Originally, "block" was the time the chocks got put in.
Still is, hence the terms blocking in and blocking out. I've never heard of different understandings, just different parameters that trigger the acars to record and send out/in times (now we can't hand paperwork through the galley svc door tricking the system).