Margy Natalie wrote:
I've always wondered if it would be acceptable to provide a stair-chair
rather than install a lift. Having a stair-chair available would make
access to multiple aircraft affordable.

at least you wondered about it.

Some prefer to make assumptions based on whatever preconceived ideas
they may have. Note that stair chairs and such can be another can
of worms: how does the person transfers to it? if helps is needed
who provides it (who is qualified to do so? who is liable in case
of a snag, etc.)

back to the museum thing:

from title 2:

"...II-3.6100 General. A public entity must reasonably modify its policies,
practices, or procedures to avoid discrimination. If the public entity can
demonstrate, however, that the modifications would fundamentally alter the
nature of its service, program, or activity, it is not required to make the
modification. ..."

it's all there is to it. That has been used over and over for historical
buildings and ships and such. No need to cut holes through Elona Gay or
the Spruce Goose (by the way, Hughes would be quite upset that we keep
referring to his aircraft as such -- probably just as upset as if holes
were cut into it :-) );

--Sylvain