# STC SA3-438

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Moody A. Larsen, United States
- Description: Original Model:  GC-1A, converted to GC-1B per 337 form dated 05/18/1959.  Installed Lycoming O-290-D Engine and McCauley 1A-170-GM 7357 propeller for MSN 183 only
- Applied: May 18, 1959
- Status date: October 20, 1959
- Product: Aircraft, Small Airplane
- Data sheets: [TCDS A-766](https://openairdocs.org/tcds/A-766)
- Certificate PDF: https://openairdocs.org/files/sha256/f9/e7/f9e7bcf8198aac1e132239411f2d9999d29a3cf5e3fa8c63ed007310d300feb9
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID177455081420250903150532.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3-438

## ADs that name it (0)

None.

## Approved models (1)

- Swift Museum Foundation Inc. GC-1B ([TCDS A-766](https://openairdocs.org/tcds/A-766))

## What the certificate says

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

## Every issue (1)

- October 20, 1959: Issued, Current. [certificate](https://openairdocs.org/files/sha256/f9/e7/f9e7bcf8198aac1e132239411f2d9999d29a3cf5e3fa8c63ed007310d300feb9)

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