Post-Annual Flight

Jay Honeck wrote:
I never use the fuel gauges for anything
other than passing reference, since we do everything by visual
inspection and the timer

Doesn't everyone?

Do people actually use the fuel gauges?

On Feb 21, 2:23*pm, B A R R Y wrote:
Jay Honeck wrote:
I never use the fuel gauges for anything
other than passing reference, since we do everything by visual
inspection and the timer

Doesn't everyone?

Do people actually use the fuel gauges?

Are you serious? You're supposed to frequently cross-check your timing
calculations against the gauges, in part so you can discover a fuel
leak before it's too late. That's why an inoperative fuel gauge makes
a plane unairworthy, and illegal to fly.

On Feb 21, 12:15*pm, "Jay Honeck" wrote:
How were you able to fly in the meantime? A plane is not airworthy
without a working fuel gauge for each tank (91.205b9). Can one get a
waiver for this sort of thing?

In an incredible display of aviation daring...I placarded the gauge as INOP,
and flew the plane. *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. *(A very handy feature that I never,
ever, expected to use -- but we literally use it on every flight.)

If I wasn't looking for something not working in the panel (a habit I've
formed after a decade of "maintenance-induced failures") I'm not sure how
long it would have taken for me to accidentally notice it wasn't working.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993www.AlexisParkInn.com
"Your Aviation Destination"

I thought placarding as "INOP" was only legal for non-required
equipment? Required equipment being what is listed in 91.205 ANDed
with the aircraft equipment list?

Steve

I thought placarding as "INOP" was only legal for non-required
equipment? Required equipment being what is listed in 91.205 ANDed
with the aircraft equipment list?

Apparently having three other fuel tanks to choose from makes a single
tank's fuel gauge "non-required"...
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"

On Feb 21, 5:27*pm, "Jay Honeck" wrote:
Apparently having three other fuel tanks to choose from makes a single
tank's fuel gauge "non-required"...

Huh? FAR 91.205b9 requires, "in operable condition", a "fuel gauge
indicating the quantity of fuel in each tank". Which part of "each
tank" makes a single tank's fuel gauge sound optional?

On Thu, 21 Feb 2008 22:27:27 GMT, "Jay Honeck"
wrote:

I thought placarding as "INOP" was only legal for non-required
equipment? Required equipment being what is listed in 91.205 ANDed
with the aircraft equipment list?

Apparently having three other fuel tanks to choose from makes a single
tank's fuel gauge "non-required"...

Not if the regulation says *EACH* tank guage. Does your equipment
list have R, S, or O next to the guage for the tank?

On Feb 21, 12:15*pm, "Jay Honeck" wrote:
How were you able to fly in the meantime? A plane is not airworthy
without a working fuel gauge for each tank (91.205b9). Can one get a
waiver for this sort of thing?

In an incredible display of aviation daring...I placarded the gauge as INOP,
and flew the plane. *

Yikes. You didn't even take the precaution of always using the other
tank when landing, rather than using the one that doesn't tell you if
it's about to run dry?

Placarding INOP is for optional devices. Working fuel gauges are
required for airworthiness.

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.

If I wasn't looking for something not working in the panel (a habit I've
formed after a decade of "maintenance-induced failures") I'm not sure how
long it would have taken for me to accidentally notice it wasn't working.

Yikes.

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.
--
Jay Maynard, K5ZC http://www.conmicro.com
http://jmaynard.livejournal.com http://www.tronguy.net
http://www.hercules-390.org (Yes, that's me!)
Buy Hercules stuff at http://www.cafepress.com/hercules-390

On Feb 21, 3:34*pm, 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?

Say you're expecting the tank to be two-thirds full, but the gauge
says it's one-eight full, and dropping fast. Then you should suspect a
possible leak, and land the plane quickly.

You're right that more-accurate gauges would be even more useful. But
that's no reason to ignore (or to illegally forgo) what limited
usefulness there may be.

I was taught to verify the tank's level on preflight, and use time and
consumption per hour to figure usage.

I was taught to do that AND to cross-check with the gauges, and to
trust whichever method gives the lower indication at the moment. I was
taught to check the gauges again when switching tanks, to make sure
I'm switching to the fuller one as expected. I was taught to check the
gauges when preparing to land, to make sure I'm using the fuller tank
and that it's not about to run out.

I was also taught not to fly a plane that's not legally airworthy.

But what matters isn't what you or I happened to be taught, but rather
what makes sense. Having and using working fuel gauges makes a great
deal of sense, for the reasons just given.

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.


--
Jim Pennino

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