# STC SA4154WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Navion Customs, LLC, United States
- Description: Installation of tubular engine mount, cowling, cooling baffles, air induction system and cowl flap mechanism
- Applied: March 1, 1980
- Status date: May 30, 2014
- Product: Aircraft, Small Airplane
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS A-782](https://openairdocs.org/tcds/A-782)
- Certificate PDF: https://openairdocs.org/files/sha256/38/7a/387a7889c791d7a8d9364671219e54be87c1a7ee41d9fc6ffff68fb89e8df7ad
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A658188C1F42533D86257D32004E8865.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4154WE

## ADs that name it (0)

None.

## Approved models (6)

- 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.

This Certificate issued to Navion Customs, LLC 7000 Merrill Avenue, Box 95 Chino, California 91710 Part 3* of the Civil A ir R egulations . *CAR 3 as specified on Revision 48 of aircraft specification A-782.

Original Product Type Certificate N umber:

M ake:

M odel:

A-782

Navion

Navion A, B, D, E, F, G

Description of Type Design Change : Installation of tubular engine mount, cowling, cooling baffles, air induction system and cowl flap mechanism in accordance with G ama Enterprises Modification Instructions titled, “Directions for Installation of G ama Enterprises Engine Mount and Cowling Assembly for Navion Aircraft“ dated March 17, 1980.

Limitations and Conditions: The approval if this change in type design applies basically to the above -listed models only. This approval should not be extended to other specific airplanes of these models 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 are inc orporated 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. Limited to Navion E equipped with Continental IO -470-C engines only; and Models Navion A, B, F, and G equipped with Continental IO -470-H engines per Spec. A -782 and Item 139, including Note 6. 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 : March 1, 1980

Date of issuance: April 10, 1980

Date reissued: February 20, 1990, March 6, 2013 May 30, 2014 Date amended:

B y direct ion of the A dministrator

(Signature) Haifa Haj-Eid Supervisor, Technical & Administrative Support Staff, Los Angeles Aircraft Certification Office

(Title)

Transfer the ownership of the Supplemental Type Certificate Number to (Name of transferee) (Address of transfer) (Number and street)

(City, State, and Zip code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street)

(City, State, and Zip code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (2)

- May 30, 2014: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/38/7a/387a7889c791d7a8d9364671219e54be87c1a7ee41d9fc6ffff68fb89e8df7ad)
- March 6, 2013: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/a4/9f/a49f18c867ec6f06c0d749ca36f5a3731055cd68ae4a2f7af8c6e2b2b2eb0b38)

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