# STC SA123NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Christensen, Roger D., United States
- Description: Installation of a modified landing gear axle to accommodate Goodyear 29x13x5 airwheel and tire assembly with Cleveland brakes
- Applied: July 14, 1974
- Status date: August 2, 1974
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 1A2](https://openairdocs.org/tcds/1A2)
- Certificate PDF: https://openairdocs.org/files/sha256/a8/91/a891db085710084d956c8e3ec591901d847a1996df9693621bfe3adf6b839ee7
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F89AFAAAB67F07BF86257AE00072CFBA.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA123NW

## ADs that name it (0)

None.

## Approved models (1)

- Piper Aircraft Inc. PA-18-150 ([TCDS 1A2](https://openairdocs.org/tcds/1A2))

## What the certificate says

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

## Every issue (1)

- August 2, 1974: Issued, Current. [certificate](https://openairdocs.org/files/sha256/a8/91/a891db085710084d956c8e3ec591901d847a1996df9693621bfe3adf6b839ee7)

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