Denny wrote:

Ask the airport manager if he requires that all transient aricraft have
the airport as named insured before using the airport... If not, then
they are discriminating among users of a public airport, which is a
violation of federal law..
The reality is that if someone gets injured, say by walking into a
prop, it doesn't make any difference if the plane has been sitting
there 90 seconds or 90 days...

Sure it does. The plane based there is much more likely to be the one
causing the accident. It's all about reducing the risk that you have
control over.


The airport's risk level is the same...
The other reality is that the airport is the landlord for renters and
the renters will probably have to compromise in the end, but by keeping
their feet to the fire you can keep their demands down to a reasonable
level...

It's not unreasonable and is quite common.