By your method of reading the regs, then every airplane in the world has to
be grounded because the compass cannot be adjusted to read correctly at each
and every heading...
Whereas, in the real world a compass deviation card is perfectly legal, and
is in fact, required..

So too is a fuel indicator correction card legal as long as the gauge
directly reads correctly at one point - zero useable...
In fact, I have a fuel gauge correction card on the panel... My gauge(s)
reads empty at zero useable - and it ain't kidding, you've got about 90
seconds to switch, or else...
Now, a gauge that reads full all the time in flight due to some tank vacuum
problem, doesn't meet the regs...
denny
wrote in message
...
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

Remove -spam-sux to reply.