# STC SA1-22

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: McCauley Propeller Systems, United States
- Description: McCauley fixed pitch propellers1A170/GM7459 and 1A170/GM7457 with Lycoming O-320 engine.
- Applied: December 20, 1956
- Status date: August 15, 2006
- Product: Aircraft, Single-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS 1A6](https://openairdocs.org/tcds/1A6)
- Certificate PDF: https://openairdocs.org/files/sha256/0d/23/0d23e04f81d878fad944f687d52ef93aa716dc22487d3b03f7f4a90988382424
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2834DD0D12AC24F1862571D2006BFB2E.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1-22

## ADs that name it (0)

None.

## Approved models (1)

- The New Piper Aircraft Inc. PA-22 Series ([TCDS 1A6](https://openairdocs.org/tcds/1A6))

## 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(10-68) PAGE 1 of 2 PAGES Number SA1-22 This certificate issued to McCauley Propeller Systems 7751 East Pawnee Wichita, KS 67207

Part 3 of the Civil Air Regulations.

See Type Certificate Data Sheet 1A6 for complete certification basis.

Original Product-Type Certificate Number : 1A6 Make : The New Piper Aircraft, Inc Model : PA-22-150 Description of Type Design Change:

Installation of McCauley Propeller Systems fixed pitch MET-L-Prop models 1A170/GM7459 and 1A170/GM7457 in accordance with McCauley Propeller Drawing 1A170, Hub Boss Process Drawing C-1964 and Propeller Installation C- 1968, Revision A.

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

2. FAA Approved Airplane Flight Manual Supplement dated December 13, 1956, or later FAA approved revision, is required.

3. The PA-22-150 has Lycoming O-320 engine installed. The McCauley 1A170/GM propeller has vibration approval on this engine per Propeller Specification P857-6.

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

This certificate and the supporting data, which is the basis for approval, shall remain in effect until surrendered, suspended, revoked or a termination date is otherwise established by the Administrator of the Federal Aviation Administration.

Date reissued : August 1, 1975 August 15, 2006

( Signature) Thaddeus D. Krolicki, Jr.

Manager, Propulsion Branch Chicago Aircraft Certification Office

(Title) Date of application: December 20, 1956

Date of issuance : January 9, 1957

## Every issue (1)

- August 15, 2006: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/0d/23/0d23e04f81d878fad944f687d52ef93aa716dc22487d3b03f7f4a90988382424)

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