# STC SA3-11

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: McCauley Propeller Systems, United States
- Description: Propeller installations - Two- position controllable, hub 2B-36C7, blades 78K-2 or 78K-4.
- Applied: April 23, 1956
- Status date: August 15, 2006
- Product: Aircraft, Single-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12)
- Certificate PDF: https://openairdocs.org/files/sha256/dd/b6/ddb66afb88b06e0a7d170c48d150725ec6377d34dc1f67bb9605c841fe773180
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A6774E29E790DF2F862571D2006BFEA4.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3-11

## ADs that name it (0)

None.

## Approved models (1)

- The Cessna Aircraft Company 172 Series ([TCDS 3A12](https://openairdocs.org/tcds/3A12))

## 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 3 of 2 PAGES Number SA3-11 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 3A12 for complete certification basis.

Original Product-Type Certificate Number : 3A12 Make : The Cessna Aircraft Company Model : 172 Description of Type Design Change:

Installation of McCauley Propeller Systems two-position controllable propeller with hub 2B36C7 and blades 78K-2 in accordance with McCauley Drawing D1802, Revision B.

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

2. FAA Approved Airplane Flight Manual Supplement dated January 27, 1958 or later FAA approved revision, is required.

3. The PA-20S-125 has Lycoming O-290-D engine installed. The McCauley 1A170/GM propeller has vibration approval on this engine per Propeller Specification P857-6. Static RPM not over 2425, not under 2350.

Diameter not over 76 inches, not under 74.5 inches (no additional tolerance permitted).

4. Installation requires engine cowl per Cessna Drawing 0552002, 3-inch –45° seaplane lip on bottom cowl.

5. 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: April 23, 1956

Date of issuance : December 7, 1956

## Every issue (1)

- August 15, 2006: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/dd/b6/ddb66afb88b06e0a7d170c48d150725ec6377d34dc1f67bb9605c841fe773180)

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