# STC SA4-78

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: John P. Warren, United States
- Description: Installation of a Lycoming O-320 engine and Sensenich M74DM59 propeller. Installation of Piper PA-18A-150 engine cooling baffles, modified to fit cowling. Installation of oil cooler (Harrison AP13SJ03-01) in accordance with Piper Drawing 14368. Installation of pressure type gas tank caps.
- Applied: February 15, 1956
- Status date: March 18, 2019
- Product: Aircraft, Single-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS A-797](https://openairdocs.org/tcds/A-797)
- Certificate PDF: https://openairdocs.org/files/sha256/9d/8d/9d8d3802ed1822ccfcd40dbdb44521d31e44545c2a2618a7b4eb15566e544f0e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5821CA83104A4F0D8625843F006A3DD7.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-78

## ADs that name it (0)

None.

## Approved models (1)

- FS 2002 Corp. PA-14 ([TCDS A-797](https://openairdocs.org/tcds/A-797))

## 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 3of the Civil Air Regulations.

Installation of a Lycoming O-320 engine and Sensenich M74DM59 propeller. In stallation of Piper PA- 18A-150 engine cooling baffles, modified to fit cowling. Installation of oil cooler (Harrison AP1 3SJ03-0 1) in accordance with Piper Drawing 14368. Insta llation of pressure type gas tank caps. Installations in accordance with McKenzie Aircraft Repair Parts List and Installation instructions dated February 15 , 1956, and Drawing 200-00, Sheets 1 , 2, and 3, or later FAA approved revisions.

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 this model 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.

A copy of this Certificate and FAA Approved Flight Manual Supplement dated March 15, 1956, or later FAA approved revision, 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 797 Make: Piper Model: PA-14

Date of application: February 15, 1956

Date of issuance: January 18, 1957 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; 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/sha256/9d/8d/9d8d3802ed1822ccfcd40dbdb44521d31e44545c2a2618a7b4eb15566e544f0e)
- November 19, 2012: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/d9/47/d9478da14310ddd02f9da0a28c2112fbf85c38d98c93edb2d183c806bef91c19)
- March 1, 2002: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/f2/fa/f2fab8a690d312514b3f186f511e54de4d0b6a72d84cf1b4e4cdf000447049ec)

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