# STC SA4-89

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: J.E. Lane Jr., United States
- Description: Replacement of wing fabric by metal .020 Alclad 2024T3 aluminum alloy
- Applied: July 31, 1956
- Status date: August 6, 1956
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-768](https://openairdocs.org/tcds/A-768)
- Certificate PDF: https://openairdocs.org/files/sha256/92/81/9281ab00c50c5703fe1429e01700072b19e51c87b6a33f21a580170a85e61558
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/798E6C0D9EAC0756862579840061DD85.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-89

## ADs that name it (0)

None.

## Approved models (2)

- Cessna Aircraft Company 120 ([TCDS A-768](https://openairdocs.org/tcds/A-768))
- Cessna Aircraft Company 140 ([TCDS A-768](https://openairdocs.org/tcds/A-768))

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (1)

- August 6, 1956: Issued, Current. [certificate](https://openairdocs.org/files/sha256/92/81/9281ab00c50c5703fe1429e01700072b19e51c87b6a33f21a580170a85e61558)

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