# STC SA279AL

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: M R Borer Aircraft Svc, United States
- Description: Installation of McCauley 1A175/GM propeller on -135 models listed and installation of McCauley 1A175/GM8241 through GM 8244 on the -150 models listed.
- Status date: August 4, 1971
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1A2](https://openairdocs.org/tcds/1A2)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CD30CEC167AAB27A85256CC20008C952.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA279AL

## ADs that name it (0)

None.

## Approved models (8)

- The New Piper Aircraft Inc. PA-18-\"135\" (Army L-21B) ([TCDS 1A2](https://openairdocs.org/tcds/1A2))
- The New Piper Aircraft Inc. PA-18-\"150\" ([TCDS 1A2](https://openairdocs.org/tcds/1A2))
- The New Piper Aircraft Inc. PA-18A-\"135\" ([TCDS 1A2](https://openairdocs.org/tcds/1A2))
- The New Piper Aircraft Inc. PA-18A-\"150\" ([TCDS 1A2](https://openairdocs.org/tcds/1A2))
- The New Piper Aircraft Inc. PA-18AS-\"135\" ([TCDS 1A2](https://openairdocs.org/tcds/1A2))
- The New Piper Aircraft Inc. PA-18AS-\"150\" ([TCDS 1A2](https://openairdocs.org/tcds/1A2))
- The New Piper Aircraft Inc. PA-18S-\"135\" ([TCDS 1A2](https://openairdocs.org/tcds/1A2))
- The New Piper Aircraft Inc. PA-18S-\"150\" ([TCDS 1A2](https://openairdocs.org/tcds/1A2))

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.