# STC SA3-690

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: D'Shannon Products Ltd., United States
- Description: Installation of Doyn Kit No. 1400 Swept-Tail Assembly per Doyn Drawing No. 1400, Revision B, dated August 18, 1961.
- Status date: August 16, 2011
- Product: Aircraft, Single-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12)
- Certificate PDF: https://openairdocs.org/files/sha256/7a/da/7adafd4876b4196fc626af33d1f2bf8c9cc272b78ac68bb20992598acbc81c10
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2A93A08432E4F4A3862578F80044B3EA.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3-690

## ADs that name it (0)

None.

## Approved models (18)

- Cessna Aircraft Company 172 ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172A ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172B ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172C ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172D ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172E ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172F (USAF T-41A) ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172G ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172H (USAF T-41A) ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172I ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172K ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172L ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172M ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172N ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172P ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172Q ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172R ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172S ([TCDS 3A12](https://openairdocs.org/tcds/3A12))

## 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: 3A12 Make: Cessna Model : 172 Date reissued : 1/25/66; 5/17/78; 3/9/79; 8/16/2011 Revision 4 Date amended :

( Signature)

Melvin D. Taylor, Manager Atlanta Aircraft Certification Office

( Title) Date of application :

Date of issuance : August 26, 1961

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/sha256/7a/da/7adafd4876b4196fc626af33d1f2bf8c9cc272b78ac68bb20992598acbc81c10)

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