Maybe. No comms, even on track, could well indicate the crew is under duress or worse. Back in the day KBWI either forgot to hand me off or I never heard it, I was dead center over KDCA when I called them and enquired if it was about time to change frequencies and they were a bit put out. I mentioned that maybe a handoff and readback would be good in the future.
Post 9/11 that would be a whole different thing 