Aircraft on Ground or AOG is a term in aviation maintenance indicating that a problem is serious enough to prevent an aircraft from flying. Generally there is a rush to acquire the parts to put the aircraft (A/C) back into service, and prevent further delays or cancellations of the planned itinerary.
I know AOG is a really serious issue for an airline. What I want to learn is the liability and how far it extends. For example; if AOG happens:
how long can this airplane stay in that airport?
what is the airports role in this situation? Do they help them out or just charge the amount they stay on the ground?