Hmmm..

I just did a reverse phone number lookup for 620-782-3317 on <http://www.switchboard.com>.

The phone number listed on the STC belongs to Avcon Conversions.

Avcon Conversions Inc
117 E 1st St
Udall, KS 67146
(620) 782-3317

aren't engine/serial/tail numbers on the STC along with "Do not copy"
I'm not so sure that a copy of someone elses STC will do you much good if you ever really NEED to produce your STC paperwork..
I'm sure you can get a copy if the company is still in business for a "nominal" fee.  If your origonal is lost and a "legit" duplicate cannot be obtained a copy of a like STC along with your logbook documentation and the mechanics logs should pretty much satisfy anyone...
Good luck  :-)
Michael

Avcon Conversions Bob Williams 1-800-872-0988

I just called Bob last week. He has always been great to talk to.

I have owned two 180 hp conversions from avcon. (172H & 170B)

good luck

Did you get this resolved? I have an asociate who needs the same conversion paperwork for a 175.

Kris Hoopes

I just purchased a 1962 172C, withan Avcon conversion to the Lycoming O-360-A1A with Hartzell C/S prop. It does not appear that there is a gross weight increase... Does anyone know where I can get an STC for the gross weight increase? Thank you!

I also need the paperwork for this STC.  Doing a annual on a basket case 172 with this STC installed.  Called out to Ks,  They didn't answer or return my call. Wrote them, as of today, have heard back.

By registered the STC holder by Aircraft Serial Number, Registered owner.  This just makes sure the STC holder get paid, before you could just get a copy of the STC (FAA approved Data) and do the installation your self.  I have no problem protecting the holder of the STC, but this is a legal matter not a FAA matter.  This just makes for more bureaucrat.

I do feel that in these cases the FAA should be made to suppy the date.

I have attempted contact with the Williams without success over a three month period. I finaly started calling the FAA office that has oversight for this STC holding and was able (10 APR 09) to receive a PDF file for my aircraft and this STC from Jeff Janez, after repeated phone calls and messages clearly explaining my fialed attempts at contacting the Williams. I do no know if it helped or if it was coincience, but Jeff Janez finally returned my call after leaving a message asking wheather or not the Williams had effectively abandoned their STC by not responding to requests, and it this abandonment did not therefore place the STC in public domain? Any how the STC is in my records now, the caveat is that the associated drawings referenced are the sole property of the STC holder and can only be released through him.

To Avcon and 180hp w/ c/s prop convertions
A place to start is at Del Air in Porterville, CA. Contact at 559-784-9440, Talk to Herry Delicke, he has a h/p increase STC and a gross weight increase for some modles. Sold the kits when still Avcon, befor the Williams got into it.

I obtained a copy of the cover page for the STC for my 1964E, and I have a table that shows percent power by rpm and MP.  that's about it.  I tried last year to get ahold of Mr. Williams to see about drawings for my conversion (which has been on the place since the mid 70's according to my logs).  So far no luck.  anyone had any luck finding copies of drawings etc?