# STC SA4-363

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Brittain Industries, Inc, United States
- Description: Installed Brittain/Clarkson Autopilot
- Applied: November 27, 1957
- Status date: April 25, 2016
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-782](https://openairdocs.org/tcds/A-782)
- Certificate PDF: https://openairdocs.org/files/sha256/c7/4c/c74ca73af22969043c76e8bde8263206314919226eef19e469d2958f4fd2cfab
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/537578C01EC277BD86257FCA00646E25.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-363

## ADs that name it (0)

None.

## Approved models (7)

- Sierra Hotel Aero Inc. Navion (Army L-17A) ([TCDS A-782](https://openairdocs.org/tcds/A-782))
- Sierra Hotel Aero Inc. Navion A (Army L-17B and L-17C) ([TCDS A-782](https://openairdocs.org/tcds/A-782))
- Sierra Hotel Aero Inc. Navion B ([TCDS A-782](https://openairdocs.org/tcds/A-782))
- Sierra Hotel Aero Inc. Navion D ([TCDS A-782](https://openairdocs.org/tcds/A-782))
- Sierra Hotel Aero Inc. Navion E ([TCDS A-782](https://openairdocs.org/tcds/A-782))
- Sierra Hotel Aero Inc. Navion F ([TCDS A-782](https://openairdocs.org/tcds/A-782))
- Sierra Hotel Aero Inc. Navion G ([TCDS A-782](https://openairdocs.org/tcds/A-782))

## 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

Part of the

Signature

Title Brittain Industries, Inc.

3266 N. Sheridan Road Tulsa, OK 74115 2 SA4-363 Civil Air Regulations.

3 Navion

A, B, D, E, F, G Installation of Brittain/Clarkson Autopilot in accordance with Brittain Industries, Inc. Installation Manual 11907 and optional Nav Coupler Add-On, Models B1-300, B1-301, or B1-304 installed in accordance with Installation Manuals 11907-7, 7A or 11907-11.

FAA Approved Airplane Flight Manual Supplements listed on Sealed Master Drawing Lists AP-1 and APA-1, or later FAA-approved revision, are required with this installation.

1. The installer must determine whether this design change is compatible with previously approved modifications.

2. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

April 25, 2016 November 27, 1957 January 31, 1958 A-782 2/1/60; 7/31/61; 12/4/61; 11/10/69; 11/1/72 Revision 6; 11/19/2013;

John Hardie, Acting Manager, Fort Worth Aircraft Certification Office Southwest Region

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

To (Name and address of transferee)

From (Name and address of grantor)

## Every issue (2)

- April 25, 2016: Amended, Current. [certificate](https://openairdocs.org/files/sha256/c7/4c/c74ca73af22969043c76e8bde8263206314919226eef19e469d2958f4fd2cfab)
- November 19, 2013: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/8b/b7/8bb76a64f1ffd91f36a1fdedc89084306862f9e2d2a47eb3b58650cef8a6f29d)

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