# STC SA243NW

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Machen Inc, United States
- Description: Installation of Lycoming IO-540 engine with 3-bladed Hoffman, 3-bladed Hartzell, or 2-bladed Hartzell propeller.
- Applied: August 24, 1975
- Status date: November 1, 1998
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A12SO](https://openairdocs.org/tcds/A12SO)
- Certificate PDF: https://openairdocs.org/files/sha256/ec/16/ec163c4bf93589ad69919e41d45b956eb1d9c2d5188f4f88b4a0922694ebf698
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/847FA241234C5C5185256CC200015E26.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA243NW

## ADs that name it (0)

None.

## Approved models (1)

- Commander Aircraft Company 112 ([TCDS A12SO](https://openairdocs.org/tcds/A12SO))

## What the certificate says

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

## Every issue (1)

- November 1, 1998: Amended, Current. [certificate](https://openairdocs.org/files/sha256/ec/16/ec163c4bf93589ad69919e41d45b956eb1d9c2d5188f4f88b4a0922694ebf698)

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