Thread: Post-Annual Flight
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Old February 22nd 08, 12:21 PM posted to rec.aviation.piloting,rec.aviation.owning
B A R R Y[_2_]
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Default Post-Annual Flight
wrote:
In rec.aviation.owning Jay Maynard wrote:
On 2008-02-21, wrote:
I never use the fuel gauges for anything other than
passing reference, since we do everything by visual inspection and the timer
in our Garmin GTX-327 transponder.
How do visual inspection or your timer tell you if you've got an in-
flight fuel leak? That's an important reason for the fuel-gauge
requirement.

How does a fuel gauge that's so unreliable that you can't trust it to within
a quarter tank tell you whether you've got a fuel leak? That description
applies to every aircraft I flew during my primary training, late 1970s
vintage Cessna and Piper and Grumman products (this was in the late 1980s).
I was taught to verify the tank's level on preflight, and use time and
consumption per hour to figure usage.


23.1337(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...

23.1337(b)(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...

91.205 Powered civil aircraft with standard category
U.S. airworthiness certificates: Instrument and equipment
requirements.

(a) General. Except as provided in paragraphs (c)(3) and (e) of this
section, no person may operate a powered civil aircraft with a
standard category U.S. airworthiness certificate in any operation
described in paragraphs (b) through (f) of this section unless that
aircraft contains the instruments and equipment specified in those
paragraphs (or FAA-approved equivalents) for that type of operation,
and those instruments and items of equipment are in operable
condition.

(b) Visual-flight rules (day). For VFR flight during the day, the
following instruments and equipment are required:
...
(9) Fuel gauge indicating the quantity of fuel in each tank.

If "you can't trust it to within a quarter tank", you should probably
get it fixed.

Yeah, I know, it is common and nobody seems to care, but that isn't
what the regs say.