Jay Honeck writes:

Most owners would say running an extension cord is fine. Some would
not.

To some extent, it depends on whether or not you carry passengers. I
don't see any problem with an owner doing anything if he's the only
person in the plane; if it crashes, chances are that he'll be the only
one to die. But if he takes on passengers, that's different. And if
he rents the plane out, that's different, too. In these latter cases,
I would expect regulations to be meticulously obeyed, and I'd hold the
owner liable if they were not, unless I released him from liability in
advance.

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