# STC SA677WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Brittain Industries, Inc, United States
- Description: Installation of Brittain/Beech Model B-4 Flight Control System including PC-1 Pitch Assist, AH-1 Altitude Hold and NAV-1 Navigation Coupler
- Applied: April 24, 1964
- Status date: October 28, 2013
- Product: Aircraft, Small Airplane
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS A-777](https://openairdocs.org/tcds/A-777)
- Certificate PDF: https://openairdocs.org/files/sha256/3d/85/3d853dc11d49bd8fa7b5320d79e2dd737ceb0350d50625ae713a65900079fdb6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D5FD7D629207210786257DCC0055516D.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA677WE

## ADs that name it (0)

None.

## Approved models (9)

- Beechcraft Corporation 35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Beechcraft Corporation 35R ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Beechcraft Corporation A35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Beechcraft Corporation B35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Beechcraft Corporation C35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Beechcraft Corporation D35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Beechcraft Corporation E35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Beechcraft Corporation F35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Beechcraft Corporation G35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))

## 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.

Number SA677WE

This certificate issued to: Brittain Industries, Inc.

3266 N. Sheridan Road Tulsa, OK 74115

Part 3 of the Civil Air Regulations.

Original Product – Type Certificate Number: A-777

Make: Beech Model: 35 Series

Installation of Brittain/Beech Model B-4 Flight Control System including PC-1 Pitch Assist, AH-1 Altitude Hold and NAV-1 Navigation Coupler, (optional Hi-Lo Sensitivity Adaptor, per Installation Manual 11961). Installed in accordance with Brittain Industries, Inc.

Installation Manual 11905-27, 27R. Brittain Industries, Inc. FAA Approved Airplane Flight Manual Supplement listed on sealed Master Drawing List #C-20A or later FAA approved revision required with this installation.

Applicable eligible aircraft models and FAA Approved Airplane Flight Manual Supplement listed on sealed Master Drawing List #C-20A or later FAA approved revision.

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: April 24, 1964 Date reissued: October 28, 2013 11/10/69; 11/2/72 Revision 2 Date of issuance: May 1, 1964 Date amended:

Signature S. Frances Cox

Title Manager, Special Certification Office, Southwest Region

FAA Form 8110-2 (8/13) Page 1

**SUPPLEMENTAL TYPE CERTIFICATE, FAA FORM 8110-2 (CONTINUED)**

To (Name of transferee)

(Address of transferee)

(Number and street)

(City, State, and ZIP Code)

From (Name of grantor)

(Address of grantor)

(Number and street)

(City, State, and ZIP Code)

FAA Form 8110-2 (8/13) Page 2

## Every issue (1)

- October 28, 2013: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/3d/85/3d853dc11d49bd8fa7b5320d79e2dd737ceb0350d50625ae713a65900079fdb6)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.