# STC SA09879AC

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: James A. Ridpath, Jr., United States
- Description: Installation of the Continental Motors IO-520-D engine and a Hartzell PHC-J3YF-1RF/F8468A-6R propeller
- Applied: January 30, 2017
- Status date: July 26, 2017
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-782](https://openairdocs.org/tcds/A-782)
- Certificate PDF: https://openairdocs.org/files/sha256/8d/03/8d03616df4da3791e93d4408b7316d227661fd9e2e0413905de6696ae958f59c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C5B15204A35208DA8625816F0052F2C2.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09879AC

## ADs that name it (0)

None.

## Approved models (1)

- Sierra Hotel Aero Inc. Navion A (Army L-17B and L-17C) ([TCDS A-782](https://openairdocs.org/tcds/A-782))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

FAA Form 8110-2 (5/14) Page 1 of This certificate issued to:

Part of the Original Product – Type Certificate Number: Make:

By Direction of the Administrator Signature Title A-782 James A. Ridpath, Jr.

9710 Joliet Ave., Apt. A Lubbock, TX 79423 2 SA09879AC Civil Air Regulations 3 Sierra Hotel Aero (Ryan) Navion A Installation of the Continental Motors IO-520-D engine and a Hartzell PHC-J3YF-1RF/F8468A-6R propeller. The Airplane Flight Manual Supplement (AFMS) dated July 26, 2017, or later FAA Approved revision is required.

The installer must determine whether this design change is compatible with previously approved modifications. This STC is limited to only Navion A airplane, Serial Number NAV-4-1806.

January 30, 2017 July 26, 2017 Jim Grigg Manager, Fort Worth ACO Branch Compliance & Airworthiness Division

FAA Form 8110-2 (5/14) Page 2 of

To (Name and address of transferee)

From (Name and address of grantor)

2 SA09879AC

## Every issue (1)

- July 26, 2017: Issued, Current. [certificate](https://openairdocs.org/files/sha256/8d/03/8d03616df4da3791e93d4408b7316d227661fd9e2e0413905de6696ae958f59c)

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