Autogas STC Paperwork

[Al Gilson]

Our 1964 Skyhawk has a placard by the fuel cap indicating that it is
approved for unleaded auto fuel. However, I don't have any paperwork
showing that it has an STC for autofuel. Any ideas on how I could
research this information? Or...is the placard all I need?

Thanks.

--
Al Gilson
Spokane, WA USA
1970 VW Convertible
1964 Cessna Skyhawk

[kage]

You can apply to the FAA to get copies of all the 337's on the airplane. I'd
start there.

Karl
Waikiki Beach

"Al Gilson" > wrote in message
...
> Our 1964 Skyhawk has a placard by the fuel cap indicating that it is
> approved for unleaded auto fuel. However, I don't have any paperwork
> showing that it has an STC for autofuel. Any ideas on how I could
> research this information? Or...is the placard all I need?
>
> Thanks.
>
> --
> Al Gilson
> Spokane, WA USA
> 1970 VW Convertible
> 1964 Cessna Skyhawk

[Mike Adams]

(Al Gilson) wrote:

> Our 1964 Skyhawk has a placard by the fuel cap indicating that it is
> approved for unleaded auto fuel. However, I don't have any paperwork
> showing that it has an STC for autofuel. Any ideas on how I could
> research this information? Or...is the placard all I need?
>
> Thanks.
>

We used to have a 1966 Skyhawk, and it had the Autogas STC. There was more
to it than just a placard, there was definitely an STC certificate in the
log book. I no longer have a copy of it though, so can't tell you much more
about the STC.

Mike

[Craig]

(Al Gilson) wrote in message >...
> Our 1964 Skyhawk has a placard by the fuel cap indicating that it is
> approved for unleaded auto fuel. However, I don't have any paperwork
> showing that it has an STC for autofuel. Any ideas on how I could
> research this information? Or...is the placard all I need?
>

Order a copy of the FAA's file on your aircraft. I seem to remember it
will cost you about 5 bucks on a CD. It should have everything in
there that the fed's have.

Check the FAA website for all the details.

Craig C.

[N7155A]

Al,
If you can determine which STC you have: Either Petersen or EAA, I
would contact them, with your tailnumber, and they should be able to
confirm that STC was applied to your aircraft. They will gladly sell
you the STC instructions, more placards, engine tag or whatever is
needed to comply with the STC.

You should also get check your FAA records and your logbooks to see
that all the proper entries were made. If not, your Authorize
Inspector can update your paper work.

Mitch - N7155A, N10681



(Al Gilson) wrote in message >...
> Our 1964 Skyhawk has a placard by the fuel cap indicating that it is
> approved for unleaded auto fuel. However, I don't have any paperwork
> showing that it has an STC for autofuel. Any ideas on how I could
> research this information? Or...is the placard all I need?
>
> Thanks.

[MRQB]

Yea its only $5.00 for the CD of all information on your airplane

https://diy.dot.gov

"kage" > wrote in message
...
> You can apply to the FAA to get copies of all the 337's on the airplane.
I'd
> start there.
>
> Karl
> Waikiki Beach
>
> "Al Gilson" > wrote in message
> ...
> > Our 1964 Skyhawk has a placard by the fuel cap indicating that it is
> > approved for unleaded auto fuel. However, I don't have any paperwork
> > showing that it has an STC for autofuel. Any ideas on how I could
> > research this information? Or...is the placard all I need?
> >
> > Thanks.
> >
> > --
> > Al Gilson
> > Spokane, WA USA
> > 1970 VW Convertible
> > 1964 Cessna Skyhawk
>
>

[Matthew P. Cummings]

On Mon, 05 Apr 2004 19:34:48 -0700, Al Gilson wrote:

> approved for unleaded auto fuel. However, I don't have any paperwork
> showing that it has an STC for autofuel. Any ideas on how I could
> research this information? Or...is the placard all I need?

Others have already said to contact the EAA and Peterson providing the
planes information to research it.

However, at least with the EAA STC you will have an entry in the airframe
and engine logbooks where it was applied. Without those entries what you
have is a sticker somebody bought and stuck up there, worth nothing. The
EAA STC is supposed to be carried in the plane while you're using it, so
without the paperwork you can not legally burn augogas, even if you bought
the STC.

[Dan Thompson]

Personally, I'd say the placard is all you need, but only if you are sure
the STC for a plane like yours is just a paper whipping excercise. If so,
I'm sure you don't even need the placard to fly on autofuel.

These autofuel STCs that are nothing more than an Adel clamp and a placard
have an "Alice in Wonderland" feel to me.

"Al Gilson" > wrote in message
...
> Our 1964 Skyhawk has a placard by the fuel cap indicating that it is
> approved for unleaded auto fuel. However, I don't have any paperwork
> showing that it has an STC for autofuel. Any ideas on how I could
> research this information? Or...is the placard all I need?
>
> Thanks.
>
> --
> Al Gilson
> Spokane, WA USA
> 1970 VW Convertible
> 1964 Cessna Skyhawk

[Newps]

Dan Thompson wrote:
> Personally, I'd say the placard is all you need, but only if you are sure
> the STC for a plane like yours is just a paper whipping excercise. If so,
> I'm sure you don't even need the placard to fly on autofuel.

For a 172 it's only paper whipping. However to be legal you need the
337 filled out and sent in, the logbook entry, the clamp, and the
placards at the fuel fillers.

[Jim Weir]

If Alice can save me up to $50 each time I fill up, I say more power to her.

And, for the original post, get the 337 file from Ok City FAA for your aircraft.
You may uncover some OTHER additional "stuff" you didn't know about your
airplane. If you go to Oshkosh, the Feds *generally* have a table set up and
little gift certificates where you get the file on microfiche or CDROM for free.

Jim



"Dan Thompson" >
shared these priceless pearls of wisdom:

->
->These autofuel STCs that are nothing more than an Adel clamp and a placard
->have an "Alice in Wonderland" feel to me.

Jim Weir (A&P/IA, CFI, & other good alphabet soup)
VP Eng RST Pres. Cyberchapter EAA Tech. Counselor
http://www.rst-engr.com

[Bob Martin]

> For a 172 it's only paper whipping. However to be legal you need the
> 337 filled out and sent in, the logbook entry, the clamp, and the
> placards at the fuel fillers.

Where does the clamp go, and what does it do? Just curious

[Jim Weir]

It goes on the pushrod tube. Its main function is to add 0.05 to the weight of
the aircraft without having any other use other than to prove that you spent a
dollar a horsepower to buy it..

Jim


(Bob Martin)
shared these priceless pearls of wisdom:

->> For a 172 it's only paper whipping. However to be legal you need the
->> 337 filled out and sent in, the logbook entry, the clamp, and the
->> placards at the fuel fillers.
->
->Where does the clamp go, and what does it do? Just curious

Jim Weir (A&P/IA, CFI, & other good alphabet soup)
VP Eng RST Pres. Cyberchapter EAA Tech. Counselor
http://www.rst-engr.com

[G.R. Patterson III]

Dan Thompson wrote:
>
> Personally, I'd say the placard is all you need, but only if you are sure
> the STC for a plane like yours is just a paper whipping excercise.

Even if the STC for your aircraft is just a "paper-whipping" exercise, beware that
the STC on many of these aircraft specifies a minimum operational rpm level. It may
be OK to dump mogas in a Cessna 150 (to pick an example) without actually springing
for the SCT, and it may not. Unfortunately, I no longer remember the rpm level for
that plane, but my A&P had to adjust the carb a tad when I bought the STC.

George Patterson
This marriage is off to a shaky start. The groom just asked the band to
play "Your cheatin' heart", and the bride just requested "Don't come home
a'drinkin' with lovin' on your mind".

[Bob Martin]

Jim Weir > wrote in message >...
> It goes on the pushrod tube. Its main function is to add 0.05 to the weight of
> the aircraft without having any other use other than to prove that you spent a
> dollar a horsepower to buy it..

Pushrod tube? As in the throttle linkage or something? I have no
idea what a "normal" carb looks like; we have one of those Ellison
TBI's. Sorry to be kind of dense here, but some of the things the FAA
restricts (as far as equipment and certification) seem absolutely
ridiculous.

[G.R. Patterson III]

Bob Martin wrote:
>
> Pushrod tube? As in the throttle linkage or something?

Nothing to do with the carb. Each cylinder has two valves (intake and exhaust). These
are opened by a camshaft, which is located in the center of the engine. The camshaft
lobes push indirectly on rods that run up to the top of the cylinder to activate the
valves. Each rod is encased in a tube about 3/4" in
diameter. On Lycomings, these pushrod tubes are located above the cylinders.

George Patterson
This marriage is off to a shaky start. The groom just asked the band to
play "Your cheatin' heart", and the bride just requested "Don't come home
a'drinkin' with lovin' on your mind".

[John Galban]

Jim Weir > wrote in message >...
> It goes on the pushrod tube. Its main function is to add 0.05 to the weight of
> the aircraft without having any other use other than to prove that you spent a
> dollar a horsepower to buy it..
>

On my old 172 (O-300) the clamp went on the giant oil filler tube.
Worked great until the oil filler tube fell off in flight :-(

John Galban=====N4BQ (PA28-180)

[John Galban]

"G.R. Patterson III" > wrote in message >...
> Even if the STC for your aircraft is just a "paper-whipping" exercise, beware that
> the STC on many of these aircraft specifies a minimum operational rpm level. It may
> be OK to dump mogas in a Cessna 150 (to pick an example) without actually springing
> for the SCT, and it may not. Unfortunately, I no longer remember the rpm level for
> that plane, but my A&P had to adjust the carb a tad when I bought the STC.
>

I had the Petersen STC which also required a check for the presence
of composite floats in the carb. The previous owner skipped that
check and the floats sunk after a few months of autogas use. Ended up
with a giant puddle of fuel around the airplane.

John Galban=====>N4BQ (PA28-180)