wrote in message
...
It just seems that a fuel gauge is not as important
as the attitude indicator yet the attitude indicator is not required.

Why is an attitude indicator important if you can look out the window? In
instrument conditions, a working attitude indicator is indeed required.
(It's true, though, that there are some nominally VFR conditions--such as
flying at night over water--that can require flying by instruments; and
there is arguably a gap in the FARs with regard to requiring an attitude
indicator in those conditions.)

--Gary