# STC SA4-145

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Skybound Manufacturing Inc., United States
- Description: Removal of C-125, Continental Engine and installation of C145, Continental Engine and Koppers Model F200 and F200-H propellers with 0073-E blades in all model GC-1B Swifts.  Maximum engine power restricted to 125 hp at 2550 rpm and 25.8 in. Hg. MAP.  Installation must be made per Preston Johnson Drawing No. PDJ-3.
- Applied: December 3, 1956
- Status date: June 25, 2003
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-766](https://openairdocs.org/tcds/A-766)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1E3504D8C31FC47086256D8A00691AE7.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-145

## ADs that name it (0)

None.

## Approved models (1)

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

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