# STC SA3-691

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: D'Shannon Products Ltd., United States
- Description: Installation of Doyn swept-tail assembly kit 1400.
- Status date: August 16, 2011
- Product: Aircraft, Single-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS 3A17](https://openairdocs.org/tcds/3A17)
- Certificate PDF: https://openairdocs.org/files/sha256/27/28/27285af76fbb9b7c1e9bfd0842efd6c2fe5dd68d817d8d2179fbe24b44cb3ef6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3E318EF50B989D29862578F8006492CE.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3-691

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 175 ([TCDS 3A17](https://openairdocs.org/tcds/3A17))

## 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.

This certificate issued to

Part 3 of the Civil Air Regulations.

Description of Type Design Change: Installation of Doyn Kit No. 1400 Swept-Tail Assembly per Doyn Drawing No.

1400, Revision B, dated August 18, 1961.

Compatibility of this modification with other previously approved modifications must be determined by the installer.

D’Shannon Products, Ltd.

1309 County Road 134 Buffalo, MN 55313 Original Product --Type Certificate Number: 3A17 Make: Cessna Model : 175 Date reissued : 1/25/66; 5/17/78; August 16, 2011 Revision 2 Date amended :

( Signature)

Melvin D. Taylor, Manager Atlanta Aircraft Certification Office

( Title) Date of application :

Date of issuance : August 29, 1961

INSTRUCTIONS: Thc transfer endorsement below may be used to notify the appropriate FAA Regional Office of the transfer of this Supplemental Type Certificate.

The FAA will reissue the certifi cate in the name of the tran sferee and forward it to him.

Transfer the ownership of Supplemental Type Certificate Number

to (Name of transferee)

(Address of transferee) (Number and Street)

(City, State, and ZIP code)

from (Name of grantor) (Print or type)

(Address of grantor) (Number and Street)

(City, State, and ZIP code)

Signature of grantor (In ink):

## Every issue (1)

- August 16, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/27/28/27285af76fbb9b7c1e9bfd0842efd6c2fe5dd68d817d8d2179fbe24b44cb3ef6)

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