# STC SA4-423

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Brittain Industries, Inc, United States
- Description: Installed Brittain Industries, Inc., B2D Flight Control System
- Applied: November 27, 1957
- Status date: October 31, 2016
- Product: Aircraft, Small Airplane
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS 1A6](https://openairdocs.org/tcds/1A6)
- Certificate PDF: https://openairdocs.org/files/sha256/6a/d1/6ad141c016a63dfeaaf25fa2c9b764885283f237516bdcc1155d7884934e4edd
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1BA037E6F9D40678862580B500686FFE.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-423

## ADs that name it (0)

None.

## Approved models (5)

- Piper Aircraft Inc. PA-22 ([TCDS 1A6](https://openairdocs.org/tcds/1A6))
- Piper Aircraft Inc. PA-22-108 ([TCDS 1A6](https://openairdocs.org/tcds/1A6))
- Piper Aircraft Inc. PA-22-135 ([TCDS 1A6](https://openairdocs.org/tcds/1A6))
- Piper Aircraft Inc. PA-22-150 ([TCDS 1A6](https://openairdocs.org/tcds/1A6))
- Piper Aircraft Inc. PA-22-160 ([TCDS 1A6](https://openairdocs.org/tcds/1A6))

## 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.

FAA Form 8110-2 (5/14) Page 1 of 2

Number: SA4-423

Part 3 of the Civil Air Regulations.

Original Product – Type Certificate Number: 1A6 Make: Piper Model: PA-22, PA-22-108, PA-22-135, PA-22-150, PA-22-160

Installed Brittain Industries, Inc., B2D Flight Control System in accordance with Brittain Industries, Inc. Installation Manual No.

11906.

FAA Approved Brittain Aircraft Flight Manual Supplement dated July 31, 1961, or later FAA approved revision required with this installation.

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.

Date of Application: November 27, 1957 Date Reissued: November 19, 2013; October 31, 2016;

7/31/61; 11/10/69; 11/2/72 Revision 3 Date of Issuance: February 15, 1958 Date Amended:

Signature

Title James A. Grigg Acting Manager, Fort Worth Aircraft Certification Office, Southwest Region Brittain Industries, Inc.

3266 N. Sheridan Road Tulsa, OK 74115

FAA Form 8110-2 (5/14) Page 2 of 2

Transfer the ownership of Supplemental Type Certificate Number: SA4-423

To (Name and address of transferee)

From (Name and address of grantor)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: ST10962SC

FAA Form 8110-2 (5/14) Page 3 of 3

## Every issue (2)

- October 31, 2016: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/6a/d1/6ad141c016a63dfeaaf25fa2c9b764885283f237516bdcc1155d7884934e4edd)
- November 19, 2013: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/0a/7e/0a7e9f82122e6a0fdebe56b22f9a2631c0163f94bfc52ec766f3fb6907bd6f18)

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