# STC SA4003SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Turbine Conversions Ltd, United States
- Description: Addition of servo-tabs to upper ailerons according to Drawing FA 7039, Sheets 1 and 2, dated 5/15/79, or later FAA approved revision.
- Applied: May 9, 1979
- Status date: May 10, 2011
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1A16](https://openairdocs.org/tcds/1A16)
- Certificate PDF: https://openairdocs.org/files/sha256/cb/00/cb007b0eb6166152b4e805119fddfebe6a5f7ec2bc7f28dbec979fa8fbee0fdb
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A8F8D4F438EA108F862578BD006CC0BA.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4003SW

## ADs that name it (0)

None.

## Approved models (4)

- Allied Ag Cat Productions Inc. G-164A ([TCDS 1A16](https://openairdocs.org/tcds/1A16))
- Allied Ag Cat Productions Inc. G-164B ([TCDS 1A16](https://openairdocs.org/tcds/1A16))
- Allied Ag Cat Productions Inc. G-164C ([TCDS 1A16](https://openairdocs.org/tcds/1A16))
- Allied Ag Cat Productions Inc. G-164D ([TCDS 1A16](https://openairdocs.org/tcds/1A16))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

Part 8 of the Civil Air Regulations.

Addition of servo-tabs to upper ailerons according to Drawing FA 7039, Sheets 1 and 2, dated 5/15/79, or later FAA approved revision.

This modification is considered acceptable for: 1. G-164A standard wing or with wing extensions; 2. G-164B, G-164C, G-164D; 3. G-164A, G-164B, G-164C, G- 164D with either piston or turbo-prop engines; 4. G-164D with 73-inch wing gap.

The installer must determine whether this design change is compatible with previously approved modifications. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission.

Turbine Conversions, Ltd.

18155 120th Avenue Nunica, MI 49448 1A16 Make : Schweizer (Grumman) Model : G-164A, G-164B, G-164C, G-164D Date of application : May 09, 1979

Date of issuance : June 18, 1979

Date reissued : May 10, 2011

Date amended : November 30, 1981 Rev. 1

( Signature) M. Monica Merrit, Manager Airplane Certification Office, Southwest Region

( Title)

FAA Form 8110-2-1(10-69) Page 2 of 2

## Every issue (1)

- May 10, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/cb/00/cb007b0eb6166152b4e805119fddfebe6a5f7ec2bc7f28dbec979fa8fbee0fdb)

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From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.