# STC SA4-1007

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: General Aviation Modifications Inc., United States
- Description: Installation of balance weights(Brittain Aircraft P/N 3010) on leading edge of Navion ailerons.
- Applied: December 17, 1959
- Status date: February 7, 2020
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A1](https://openairdocs.org/tcds/2A1), [TCDS A-782](https://openairdocs.org/tcds/A-782)
- Certificate PDF: https://openairdocs.org/files/sha256/b8/3c/b83cd2c1cd81dc50764986d61008622dff8dc7a879b5171263799a44f30da4ae
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/916E85E83CB38352862585450078BA20.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-1007

## ADs that name it (0)

None.

## Approved models (8)

- Multitech Engineering Corporation D-16 ([TCDS 2A1](https://openairdocs.org/tcds/2A1))
- Multitech Engineering Corporation D-16A ([TCDS 2A1](https://openairdocs.org/tcds/2A1))
- Navion Aircraft Company Ltd. Navion A (L-17B) ([TCDS A-782](https://openairdocs.org/tcds/A-782))
- Navion Aircraft Company Ltd. Navion A (L-17C) ([TCDS A-782](https://openairdocs.org/tcds/A-782))
- Navion Aircraft Company Ltd. Navion B ([TCDS A-782](https://openairdocs.org/tcds/A-782))
- Navion Aircraft Company Ltd. Navion D ([TCDS A-782](https://openairdocs.org/tcds/A-782))
- Navion Aircraft Company Ltd. Navion E ([TCDS A-782](https://openairdocs.org/tcds/A-782))
- Navion Aircraft Company Ltd. Navion F ([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.

Part 3 of the Federal Aviation R egulations.

(See T.C. Data Sheet A-782 and 2A1)

Original Product --Type Certificate N umber :

Installation of balance weights (part Brittain Aircraft #3010) on leading edge of Navion ailerons in accordance with Installation Manual #A1-1 dated December 29, 1959.

NOTE: Twin Navions originally certificated in accordance with specification A-782 are also eligible.

Limitations and Conditions: The approval of this change in type design applied basically to Standard Navion Model A, B, D, E, F and Twin Navion model aircraft. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. 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.

General Aviation Modifications, Inc.

2800 Airport Road Ada, OK 74820 A-782 M ake : Navion and Twin Navion M odel : A, B, D, E, F, and D16, D16A Date reissued : 11/10/1969; 09/17/1987; 02/02/1971;

03/1/2016; 02/07/2020 Date amended : 01/29/1960

B y direction of the A dministrator

(Signature) Monica Nemecek Manager, Airframe & Administrative Section Chicago ACO Branch

(Title)

Date of application : December 17, 1959

Date of issuance : December 17, 1959

FAA FORM 8110-2-1(10-69) PAGE 2 of 2 PAGES

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 of type)

(Address of grantor) (Number and street)

(City, State, and ZIP code)

## Every issue (2)

- February 7, 2020: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/b8/3c/b83cd2c1cd81dc50764986d61008622dff8dc7a879b5171263799a44f30da4ae)
- March 1, 2016: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/a6/be/a6beb4374469c2f9c8c90782160a06e080a5f29e03f25cebc528c2f45fa22207)

---
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.