I would ask for proof of this serialized concept. If you have the STC installation instructions and the STC covers your model of aircraft any A&P with I-A authorization should be able to install them. The serialized STC concept sounds fishy. That, as far as I know, only applies to 1 time STC's.

Cheers!

Kris

There is some information  here
You may need to contact the FAA for more info. The STC does have to be tied back to a serial number.. I do not know if that rule is retro active though.

From the FAA site..
This certificate issued to:
Madras Air Service

STC Holder's Address:
1914 N.W. Demers Dr.
Madras OR 97741
United States

Description of the Type Design Change:
Installation of Demers super tips.

Application Date:


Status:
Issued, 07/13/1982

Responsible Office:
ANM-100S Seattle Aircraft Certification Office Tel: (425) 917-6400

Hope that helps

I called ANM-100s Seattle Aircraft Certification Office:

The STC requirement by aircraft serial number applies ONLY to one time STC installations.

The original STC by Madres Air Service is approved for a large number of Cessna 182 and 182RG aircraft and the tips can be installed per the STC. The STC addendum NO. SA1938WE requires changes to the aircraft weight and balance report as well as airspeed limitations by model.

I have the STC SA1938WE and installation instructions. I am looking for a copy of the Madras Air Service Super Tips Drawing No. 102 Sheet 1 and Sheet 2 if any of you have that.

Thanks,
Richard

To: Grant Opperman & Larry Stan Ford or anyone else who might be able to help.

Do either of you have a copy of the Madras Drawing No.102 Sheet 1 & Sheet 2. I am happy to provide copies of STC SA1938WE and installation instructions to anyone who needs the airspeed info per model as well as Weight & Balance info and the placards for 182N & P models if that applies.

If anyone can help me with the drawings, please contact me at:

This e-mail address is being protected from spambots. You need JavaScript enabled to view it
or
PHONE (757) 353-2760

Many thanks
Richard Musick

I have a copy of the "Super Tips" STC # SA1938WE and continuation sheet addendum which has "page 3 of 5 pages" on the bottom. I also have pages 4 and 5 of that addendum. I also have a copy of the "Service Instructions" which mentions installation on various models including the C-175 series among others. I also have a copy of a letter from the FAA Northwest Mountain Region to Madras dated April 3, 1985 which describes the completion of the their evaluation of the STC mentioned above and indicates approval of the STC. I would like a copy of the drawings No. 102 sheets 1 and 2 if anyone has them.  Also does anyone have the STC or other paperwork for the installation of these tips on a C-175 and mentioned in the installation instructions?

First off, I would just call that Demmers guy and tell him to FUCK OFF!

I just completed an Engine change on A PA32R-300, which included four form 337 documents, and associated paperwork. They were:

1) removal of the Hartzell 2 blade prop, & the installation of a McCauley 3 blade 'scimitar' prop.

2) Installation of GAMI injectors

3) Installation of an "Aerosafe" electrically driven stand by vacuum pump.

4) Installation of a JPT engine monitor with fuel flow.

Each & every one of these STC's came with a document to register the STC, by aircraft s/n & owner. If the ownership of the airplane changes, the ownership of the STC changes as well.

I refer you to 14 CFR 21.120:

§ 21.120   Responsibility of supplemental type certificate holders to provide written permission for alterations.

A supplemental type certificate holder who allows a person to use the supplemental type certificate to alter an aircraft, aircraft engine, or propeller must provide that person with written permission acceptable to the FAA.

That registration document I'm referring to is the 'permission slip' that is acceptable to the FAA.

Obviously JPI is not issuing "one airplane only" stc's, nor McCauley or GAMI. The mechanic the original poster refered to is correct. read the reg.