wrote:
C J Campbell wrote:


You were taught a very popular myth. No doubt you were also taught the myth
(spread by Rod Machado and others) that your fuel gauge is only required to
be accurate when it reads zero fuel. The FAR require you to have a fuel
gauge that shows the quantity of fuel in each tank, whether you trust it or
not.

Which FAR covers this?

I can find the one that requires a fuel indicator, but nothing about
accuracy.


Answering my own question...

23.1337 Powerplant instruments installation.

(b) Fuel quantity indication. There must be a means to indicate to
the flightcrew members the quantity of usable fuel in each tank during
flight. An indicator calibrated in appropriate units and clearly marked
to indicate those units must be used. In addition:
(1) Each fuel quantity indicator must be calibrated to read ``zero''
during level flight when the quantity of fuel remaining in the tank is
equal to the unusable fuel supply determined under Sec. 23.959(a);


So, (b) would imply that the 172 I rent that shows the right tank at
about 3/4 full when the tank is actually full is not airworthy since
it is not indicating the quantity of usable fuel in the tank.


--
Jim Pennino

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