Ron Rosenfeld wrote:

As a matter of fact, I believe that the fuel quantity indicators are only
required to be accurate at zero fuel in level flight (for a/c certified
under Part 23).

Nope. They are required to report the amount of fuel in the tank. They can't do
that without being accurate.

George Patterson
Give a person a fish and you feed him for a day; teach a person to
use the Internet and he won't bother you for weeks.