IS there a stc to increase your husky'w weight to 2550Lbs.  What does one need to do or pay?  Sounds like a great STC to me.

Mike

> Stan, Why won't they give an increase gross with the older models, (eg.b models).

I don't have an answer. AirPlains has said they're working on a gross weight increase for the earlier 172s, but I'm not sure it's a high priority project for them. I don't know if there are significant differences in the airframe structures between the earlier and later airplanes, but I don't believe so.

> I'm betting that it has a lot to do with the 40degree flap travel...

Tony, one of my co-workers installed the Air Plains O-360 in his '77 172N and got the 250 pound gross weight increase STC at the same time. They did reduce his flap deployment from 40 degrees to 30 degrees and installed 6-ply tires, so I'm sure the flap travel would have to be limited to 30 degrees on the older airplanes, too.

If the 40 degrees of flaps is really the reason they don't offer the gross weight increase on the older airplanes, I don't understand why they couldn't mechanically limit the flap extension to 30 degrees on them just like they did on my friend's '77.

>  I have a 1957 C172 with the O-300. Who has the STC for the older model 172's?

Del-Air in Porterville, CA.

STCNumber: SA00461SE
Manufacturer: CESSNA
MakeModel: 172, 172A, 172B, 172C, 172D, 172E, 172F (USAF T-41A), 172G, 172H (USAF T-41A)
TCNumber: 3A12
Description: Install a Lycoming O-360 series engine and Hartzell, McCauley, or Sensenich propeller (See STC for specifications).
Status: Amended 8/7/98
ACO NM-L
STCHolder: Harry R. Dellicker
Del-Air
2121 S. Wildcat Way
Porterville CALIFORNIA 93257 UNITED STATES
Phone: (559) 784-9440

BushConversions in Udall kns. also has an STC for the earlier models.

I have a 1974 Cessna 172M that has an AVCON Lycoming O-360 that was installed in 1977.  I'd like to purchase the STC that allows the increased gross weight.  Anybody know how I can find out where to get it?

I bought a 1961 skylark 175-B with the G0-300 replaced with the 180hp lycoming back in 1979. I need to find information on what my gross carry weight is now and how does this affect the weights and balance chart in my owners book? My plane also has the extended range tanks at 52 gallons and a constant speed prop. Any guidance would be gratefully appreciated! Also.. I need to find a POH book for my aircraft

I have a 1977 172 n model  with a penn yann  fixed pitch prop conversion. I currently  trying to finish up my privily exam. I had trouble with the  examiner because I was  using the published V speeds from the owners Manuel. Is there  supplement or something  I can get a copy for the correct V speeds for this conversion. or a copy of the v speeds for the new 172 /180
Thanks Carl
This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Last year I purchased a 1965 172F that had the AVCON 180hp conversion done sometime in the 70's.  In 2003, when the first engine was at TBO, it was removed and a Lycoming factory reman engine was installed. A few weeks ago while performing the first oil change since my purchase I realized that there are no primer lines or nipple fittings on the engine.  The lines from the primer knob come through the firewall and hang down (disconnected) from the gascolator which is plugged where the primer draw line would connect.

As far as I can tell this does not seem to be part of the STC and the primer is not placarded as "inop."  To date I can get no response from AVCON to ask them if this is per the STC.  Does anyone know anything about this?  The plane had been through an annual every year since 2003 and had a fresh annual when I purchased it.  If there is a problem is it with A&P who performed the annuals or with the installer of the engine in 2003 or both?  Finally, how can I cheaply fix the situation and install primer lines and fittings?

Thanks,
Bryan

Dear Sir,

I am searching the STC for 180 HP conversion.
I have a Cessna 172P and Lycoming O-360-A4A and Sensenich 74EM8S5-0-60.

Please let me know the STC number.

best regards,

Aiichiro NAKAZAWA

Carl Black Wrote:
-------------------------------------------------------
> I have a 1977 172 n model  with a penn yann  fixed
> pitch prop conversion. I currently  trying to
> finish up my privily exam. I had trouble with the
> examiner because I was  using the published V
> speeds from the owners Manuel. Is there
> supplement or something  I can get a copy for the
> correct V speeds for this conversion. or a copy of
> the v speeds for the new 172 /180
> Thanks Carl
> This e-mail address is being protected from spambots. You need JavaScript enabled to view it


I have exactly the same model and conversion- 172N Penn Yan converted in 1991. Just bought it and, while waiting for the log material to arrive, had been told by Penn Yan to expect that information to be in the STC in the Technical Log. No sign of it there, and the more I nose around, the more I wonder if it's really out there at all! The POH supplements just say no change to performance section.

Penn Yan said generally to add 10 knots to the performance speeds in the POH for TAS in cruise, and expect to burn about 10.5 gph at 75% power. That's helpful , but somebody must have done the TAS and GPH numbers at some point for various cruise power levels at various temperatures (or even just at standard temp!), takeoff and landing distances (or even just takeoff distances!), and rates of climb with the beefed up engine.

I found a NTSB report from 1994 where a pilot ran out of fuel using the standard POH data with a 180 conversion. The report recommended that the STC be amended to include appropriate data, but the STC copy that I have doesn't include it.

I did find (via Google) a flight manual supplement for a 180hp conversion on a C172P model done by Air Plains Services Corporation- maybe helpful but not directly relevant.

Even if I find these numbers for the 172N on wheels, I will also need to find the numbers applicable to the plane on Baumann 2550 Floats for the Spring, so if anybody has anything on that, I'd appreciate it as well.

Any comments out there??

Thanks!

Ron Marshall

I have a 1966 172G with a Lycoming O 360 A1A, Constant Speed Prop, I think it is a BUSH Conversion, does anyone have the STC number the FAA says this not an authorized conversion. Thanks