Slot Preservation - minimum requirements
In many countries in Europe, airport slots are on an 80% use-it-or-lose-it basis
While this has been suspended due to Covid, this suspension won't be renewed forever
Apart from complying with an airport's general rules on what can fly (eg no props or no single engine aircraft) and also considering any turbulence generated from large aircraft using a runway in the previous minutes, are there any rules as to what aircraft operates a ghost flight and where it flies ?
Could a large airline swap in a leased 3-seat (yes, 3 seats) old and knackered aircraft to fly to an aerodrome 5 mins away just to keep the slot nominally "active" ?
The only real constraint I can think of is public relations - namely avoiding criticism in the press by the environmental crowd and preferring to operate a commercial passenger flight at a small loss instead of an empty puddle jumper