# STC SA4-174

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Glasco-Air Products, United States
- Description: Glass cloth application over muslin to wings only.
- Status date: January 1, 1960
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 5A2](https://openairdocs.org/tcds/5A2), [TCDS A-768](https://openairdocs.org/tcds/A-768)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7F662440A7BDA5F5862570CE0068A2DD.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-174

## ADs that name it (0)

None.

## Approved models (3)

- The Cessna Aircraft Company 120 ([TCDS A-768](https://openairdocs.org/tcds/A-768))
- The Cessna Aircraft Company 140 ([TCDS A-768](https://openairdocs.org/tcds/A-768))
- The Cessna Aircraft Company 140A ([TCDS 5A2](https://openairdocs.org/tcds/5A2))

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