# STC SA4-640

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: John P. Warren, United States
- Description: Installation of a Lycoming O-290-D2 engine and Sensenich M74DM propeller
- Applied: October 29, 1958
- Status date: March 18, 2019
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-768](https://openairdocs.org/tcds/A-768), [TCDS 5A2](https://openairdocs.org/tcds/5A2)
- Certificate PDF: https://openairdocs.org/files/sha256/17/2f/172f608073aee3588fc1b704d162a7b665c8c806f4b377d4a833343f63d0cde2
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/ADC655D8A3FFF7868625843F006BB6EC.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4-640

## ADs that name it (1)

- [AD 62-24-03](https://openairdocs.org/ad/62-24-03): Cabin Heat System · Lycoming O-235-C1, O-235-C2C, O-290-D, O-290-D2, O-320 engine (Luscombe STC SA4-173 or 5 others). Effective Nov 21, 1962. Named in the applicability

## Approved models (3)

- Cessna Aircraft Company 120 ([TCDS A-768](https://openairdocs.org/tcds/A-768))
- Cessna Aircraft Company 140 ([TCDS A-768](https://openairdocs.org/tcds/A-768))
- Cessna Aircraft Company 140A ([TCDS 5A2](https://openairdocs.org/tcds/5A2))

## 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.

Part *3/**4a of the Civil Air Regulations.*Cessna 140A/**Cessna 120, 140

Installation of a Lycoming O-290-D2 engine and Sensenich M74DM propeller, in accordance with McKenzie Aircraft Repair Installation Instructions dated October 30, 19 58, (revised August 24, 1976), and McKenzie Aircraft Repair Drawing L149- 0600-244, Sheets 1 and 2, Revisions 1, 2, and 3, or later FAA approved revisions.

NOTE: For seaplane configuration, the McCauley 1AI75/GM-8240 propeller is required.

Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only. This approval should not be extended to other aircraft of these models on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft.

This approval is also extended to the installation in the above models with the Edo 88-1650 floats. A copy of this Certificate and FAA Approved Flight Manual Supplement must be maintained as part of the permanent records for the modified aircraft.

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.

John P. Warren 1600 Ormond Road White Lake, MI 48383 A-768 5A2 Make: Cessna Cessna Model: 120, 140 140A (Land/Seaplane)

Date of application: October 29, 1958

Date of issuance: October 29, 1958 Date reissued: 3/27/68; 9/27/89; 4/8/91; 4/ 4/96; 3/1/02;

11/19/12; 3/18/19

Date amended: 10 /15/62; 8/24/76; 7/24/79; 3/1/ 02

By direction of the Administrator Original Signed By:

Monica L. Nemecek

(Signature)

Monica L. Nemecek, Manager Airframe & Administrative Services Section Chicago ACO Branch

(Title)

Transfer the ownership of Supplemental Type Certificate Number

to (Name of transferee)

(Address of transferee)

(Number and street)

(City, State, and Zip code)

from (Name of grantor) (Print or type)

(Address of grantor)

(Number and street)

(City, State, and Zip code)

Signature of grantor (In ink):

## Every issue (3)

- March 18, 2019: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/17/2f/172f608073aee3588fc1b704d162a7b665c8c806f4b377d4a833343f63d0cde2)
- November 19, 2012: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/57/af/57af7786d101ad60f8c1b48057339f60e758982d27b327016fb02df420c7458c)
- March 1, 2002: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/0c/db/0cdbcc1fa7298b4e82bec3e46b2cc57ce03ee575ecebaa0dc7ca869ccaf48c66)

---
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.