# STC SA4-820

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: M W Symons/Symons Engineering, United States
- Description: Installation of 18 gallon auziliary fuel tank in baggage compartment
- Applied: May 30, 1959
- Status date: May 11, 1959
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 5A6](https://openairdocs.org/tcds/5A6)
- Certificate PDF: https://openairdocs.org/files/sha256/a2/c2/a2c2eba9f5a5023e732e5ac6a3d609902abe5ddd118775254171780e27eb5cc5
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7E0BBA107844CA8186257F4D00697437.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-820

## ADs that name it (0)

None.

## Approved models (1)

- Textron Aviation Inc. 180 ([TCDS 5A6](https://openairdocs.org/tcds/5A6))

## What the certificate says

The certificate has no text we could read; open the PDF to read it.

## Every issue (1)

- May 11, 1959: Issued, Current. [certificate](https://openairdocs.org/files/sha256/a2/c2/a2c2eba9f5a5023e732e5ac6a3d609902abe5ddd118775254171780e27eb5cc5)

---
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.