RAT 5,
ack to the ground response; it does seem the definition of an emergency (Mayday) to us is different to other members of the team. If the a/c was operating under a PAN, and it would seem there was no need for more, why would ground call a full emergency
If I had an aircraft coming in with a missing nose wheel, I might well declare a full emergency even if the flight crew hadn't even declared a PAN.
As I said, the category of urgency decided upon by the flight crew has no direct correlation to the category of emergency response initiated on the ground. They are two very different things.
We need to separate the two in our thinking.