# STC SA4-229

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: American Navion Society, United States
- Description: 1. Removal or original step and installing Retractable step and handle.

2. Installation in accordance with Robert Douthitt s Sheet number 1 to Sheet number 10 and Installation Instructions.
- Applied: April 20, 1957
- Status date: February 11, 2004
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-782](https://openairdocs.org/tcds/A-782)
- Certificate PDF: https://openairdocs.org/files/sha256/53/41/534173ca07fd29255e1784b880394bf75b315c0044d67aa7c90afc13a5b35323
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1D10B35690097AFD86256E7E006BB927.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-229

## ADs that name it (0)

None.

## Approved models (3)

- Navion Aircraft Company Ltd. Navion (Army L-17A) ([TCDS A-782](https://openairdocs.org/tcds/A-782))
- Navion Aircraft Company Ltd. Navion A (Army L-17B and 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))

## 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

AMERICAN NAVION SOCIETY PMB 335 16420 SE McGillivray, Suite 103 Vancouver, Washington 98683-3461 Part CAR 3 of the Civil Air Regulations.

A-782 NAVION Navion, Navion A, Navion B Description of Type Design Change: 1. Removal or original step and installing Retractable step and handle.

2. Installation in accordance with Robert Douthitt’s Sheet number 1 to Sheet number 10 and Installation Instructions.

Limitations and Conditions A copy of the STC must be included with each kit you issue or each time you make the data available to other persons who intend to make the subject alteration.

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.

Date of application : April 20, 1957

Date of issuance : June 14, 1957

Date reissued : February 11, 2004

( Signature)

Manager, Technical & Administrative Support Staff, Los Angeles Aircraft Certification Office ( Title)

NOTE:

**DO NOT DELETE THIS PAGE.**

**DO NOT ADD ANY DATA TO THIS PAGE.**

**THIS PAGE IS FOR PAGE NUMBERING PURPOSES, PLEASE DISCARD PRINTED COPY.**

## Every issue (1)

- February 11, 2004: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/53/41/534173ca07fd29255e1784b880394bf75b315c0044d67aa7c90afc13a5b35323)

---
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.