# STC SA1-373

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Copper River Airmotive LLC, United States
- Description: Installation of Lycoming O-290-D(125 hp) or O-290-D2 (135 hp) engine; Sensenich M-74DM propeller; PA-18 engine baffles; Harrison#AP13SJ03-01 oil cooler.
- Applied: October 14, 1964
- Status date: February 10, 2006
- Product: Aircraft, Single-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS A-780](https://openairdocs.org/tcds/A-780)
- Certificate PDF: https://openairdocs.org/files/sha256/17/22/172209245bb9d7fe7d6750d791d049f984b8d6cf129b21b3ae4bda5c23c18603
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C90C4684ACC10D3E8625714800712ED9.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1-373

## ADs that name it (0)

None.

## Approved models (2)

- The New Piper Aircraft Inc. PA-12 ([TCDS A-780](https://openairdocs.org/tcds/A-780))
- The New Piper Aircraft Inc. PA-12S ([TCDS A-780](https://openairdocs.org/tcds/A-780))

## 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.

Number SA1-373 This certificate issued to Copper River Airmotive, LLC HC 60, Box 251B Copper Center, AK 99573

Part 3 of the Civil Air Regulations.

Original Product -- Type Certificate Number: A-780 Make : Piper

Model : PA–12 and PA-12S

Installation of a Lycoming O-290-D (125hp) or O-290-D2 (135hp) engine; Sensenich M-74DM propeller; PA-18 engine baffles;

Harrison #AP13SJ03-01 oil cooler in accordance with Aero-Marine (Lycoming “125” and “135” Installation in Piper PA-12) Manual, dated August 12, 1959. The manual contains Instruction Sheets 1, 2, 102A, 201A, 204A, 205A and 206A; and Drawings 102, 201, 204, 205 and 206.

1. Susquehanna Aero-Marine Aircraft Flight Manual Supplement for the PA-12 or PA-12S, dated 8/12/59, is required with this installation.

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

3. 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.

Date of application : October 14, 1964

Date of issuance : October 22, 1964 Date reissued : August 6, 1990, November 3, 1995, November 24, 2000, February 10, 2006

( Signature) Anthony Socias Manager, New York Aircraft Certification Office

(Title) (transferred to Anchorage ACO)

FAA Form 8110-2-1(10-69) Page 2 of 2

Number SA1-373 Date Reissued: February 10, 2006

Description of Type Design Change (continued):

The engine mount must be reinforced in accordance with Drawing 102 and Instruction Sheet 102A for use with the 0-290-D2 (135hp) engine. For seaplane, use Edo 89-2000 floats, water rudder and seaplane fin in accordance with Item 204 of Aircraft Specification A-780.

Note: This installation is also in accordance with STC SA1-51 (Piper Model PA-14) with exception of the Aircraft Flight Manual Supplements.

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## Every issue (1)

- February 10, 2006: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/17/22/172209245bb9d7fe7d6750d791d049f984b8d6cf129b21b3ae4bda5c23c18603)

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