AvCon, Avcon, Av-con, ...a con?

[Mayday]

I’ll bet you MEANT to write: “the fixed pitch Sensenich I have on there now”......

Yes! I must be inhaling too many avgas fumes.

[BobY04]

So...who's the con?

[GAHorn]

So...who's the con?

Read the entire thread if you want to know the answer.

[bpaige]

My 170B was converted to a Lycoming O-360 A1A in 1972. Logbook entries were made but the Avcon STC paperwork isn't complete in my records. The lack of paperwork has never come up during annuals so I haven't considered it a problem. Is it a problem? Should I consider buying the STC ($1200 ??) for my records?

[GAHorn]

My 170B was converted to a Lycoming O-360 A1A in 1972. Logbook entries were made but the Avcon STC paperwork isn't complete in my records. The lack of paperwork has never come up during annuals so I haven't considered it a problem. Is it a problem? Should I consider buying the STC ($1200 ??) for my records?

Lack of paperwork diminishes value and is technically not correct. You might attempt to get a copy out of the FAA records in OKC as they may have the Form 337, etc. on microfiche/CD to support the modification. Only costs about $4 and postage. Otherwise you might attempt to get the STC owner (Avcon?) to send you paperwork for a fee. If it were mine.... I’d get the paperwork before some IA figures out it’s not complete. (What you want is the STC paperwork with your aircraft’s serial/registration-number to prove it was modified legally. FAA-OKC may actually have a copy for your airplane.)

[bat443]

FAA Registry records on a CD are $10 now including postage. Also, in 1972 the authorization to use the STC statement with the aircraft N number and serial number were not required, so it is legal without it.

Tim

[bpaige]

OK... The STC, 337, and logbook entries are in my records. The STC doesn't reference my (or any) airplane by SN or RN. What is lacking is the STC installation drawings, procedures, etc. I have some of them but it looks incomplete. If there is a problem I guess I'll cross that bridge when I come to it.

[hilltop170]

STCs were not assigned to an individual airplane in 1972, that requirement came later.

Having the STC paperwork, logbook entry, and 337 signed by the IA (Block 3 sign-off by the FAA is not required with a STC) is all the installation needs to be legal.

Instructions for continued airworthiness and a Flight Manual Supplement would also be good to have when the airplane is flown.

[Bruce Fenstermacher]

Richard, a FMS, if there is one, is required when the aircraft is flown.

[GAHorn]

While waay back in 1972 the notation of aircraft I.D. on the STC document was not required... newly issued Docs by the STC holder are required to make that identification... is my understanding. This comment is based upon my personal experience when I found my B.A.S. Tail-pull was paperwork was missing from my aircraft records. I contacted B.A.S. and was informed by them of the requirement. They provided the document for $11 which was over-stamped with the AC serial/registration after I copied them in on the 337.
If you have existing docs that show a superseded registration number it is not required to update the docs provided the serial or builder’s construction number is on the existing docs. (This is an example of why serials are important because registration numbers often change due to expiry or choice.)

[marathonrunner]

I sent all complete paperwork, and installation drawings for the Avcon to the association years ago. I actually sent all paperwork I had for 337's and STC's to another member who was able to scan and download all documents on CD. I have a copy as does that member and so does the association.