# STC SA03321CH

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Professional Pilots Inc., United States
- Description: Installation of Hartzell HC-C2YR-1BFP/F8068, or HC-F2YR-1BFP/F8068 constant speed propeller
- Applied: February 1, 2014
- Status date: April 18, 2014
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 2A13](https://openairdocs.org/tcds/2A13)
- Certificate PDF: https://openairdocs.org/files/sha256/3c/fa/3cfad1b2c2f0f40d70dd360bd2362e5f0a13fc7ea62489c105629502e056a44c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AB5A1120810E0FD786257CCC005129E3.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA03321CH

## ADs that name it (0)

None.

## Approved models (2)

- Piper Aircraft Inc. PA-28-235 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))
- Piper Aircraft Inc. PA-28-236 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))

## 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.

2A13

Piper Aircraft Inc.

PA-28-235 and PA-28-236 series aircraft with specified engines

Installation of Hartzell HC-C2YR-1BFP/F8068, or HC-F2YR-1BFP/F8068 constant speed propeller in accordance with Professional Pilots Inc. Installation Instructions SUTN28-1, dated February 1, 2014, or later FAA approved revision.

1. Compatibility of this design change with previously approved modifications must be determined by the installer.

2. Hartzell HC-C2YR-1BFP/F8068 propeller is only applicable on aircraft previously equipped with a Hartzell HC-C2Y(K,R) series propeller

3. Hartzell HC-F2YR-1BFP/F8068 propeller is only applicable on aircraft previously equipped with a Hartzell HC-F2YR series propeller.

4. Aircraft must be equipped with a Lycoming: O-540-B1B5, O-540-B4B5, O-540-J3A5D engine

5. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission.

Professional Pilots Inc.

12304 West 165th Avenue Lowell, IN. 46356 February 1, 2014

April 18, 2014

Original Signed By:

Christopher Richards

(Signature) Timothy P. Smyth Manager, Propulsion & Program Management Branch Chicago Aircraft Certification Office

(Title)

## Every issue (1)

- April 18, 2014: Issued, Current. [certificate](https://openairdocs.org/files/sha256/3c/fa/3cfad1b2c2f0f40d70dd360bd2362e5f0a13fc7ea62489c105629502e056a44c)

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