Jay Honeck wrote:
I never dug deep to find out why. I can only suppose they didn't want
to lose an airplane AND a building.

That's the rule here, too. We can have it parked right in front of the
hangar but no part of the airplane can be across the door threshold. I
assume it is for the reason you state.

Our FBO routinely fuels owner's aircraft in their hangars. Always has.

Ten years ago, when we first moved into a hangar, we would return from a
flight, put the plane away, and flip a little red flapper up on the
door. Next time we came to the airport, the flapper was down, the plane
was fully fueled, and we'd get a bill at the end of the month. God, I
miss those days...

I think gas was, like, $1.74 per gallon -- and we bitched about it!

ELM, which is only 30 or so miles from where I live, lost a maintenance
hangar, 4 airplanes and lots of tools and spare parts due to a fueling
accident with an airplane inside the hangar. With the fuel spreading
across the floor, once it was ignited the hangar went up almost
instantly. Nobody was seriously injured, but even with the airport fire
department literally next door, the hangar was a total loss.

This is one rule that I believe is grounded in common sense.

Matt