Tim writes:

How is this an emergency?

It endangers the flight and other flights around it. Losing all communication
in crowded, controlled airspace is clearly an emergency.

If you already know the answer and were given instructions by
controllers to do this in the past, why pose it here?

If you already know the answer, why have you still not provided it?

While your specific example may work for you in this case, applying that
logic in other places will get you killed. If you follow the regs the
way they are written you will be fine and you won't get in trouble.

So what's the answer?

If you have an emergency (and I don;t think a non-op comms radio qualifies)
then you certainly can do whatever you need to do to make a safe ending
to the flight.

Why doesn't an inoperative radio qualify? You're in airspace that requires
two-way radio communication.

So you are saying you don't know what you are supposed to do when you
reach a clearance limit and there is no published hold?

So enlighten everyone by explaining exactly what he should do.

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