# STC SA4790NM

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Machen Inc, United States
- Description: Installation of Cleveland slotted brake disks and heavy duty brake linings.
- Applied: September 26, 1989
- Status date: April 20, 1999
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A17WE](https://openairdocs.org/tcds/A17WE)
- Certificate PDF: https://openairdocs.org/files/sha256/6c/f3/6cf33667d514e302d9b33def6479ab28217986e8835a14b8cdca458c9b6a341a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C35F07BF7633C73F85256CC2000E3EA5.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4790NM

## ADs that name it (0)

None.

## Approved models (5)

- Aerostar Aircraft Corporation PA-60-600 (Aerostar 600) ([TCDS A17WE](https://openairdocs.org/tcds/A17WE))
- Aerostar Aircraft Corporation PA-60-601 (Aerostar 601) ([TCDS A17WE](https://openairdocs.org/tcds/A17WE))
- Aerostar Aircraft Corporation PA-60-601P (Aerostar 601P) ([TCDS A17WE](https://openairdocs.org/tcds/A17WE))
- Aerostar Aircraft Corporation PA-60-602P (Aerostar 602P) ([TCDS A17WE](https://openairdocs.org/tcds/A17WE))
- Aerostar Aircraft Corporation PA-60-700P (Aerostar 700P) ([TCDS A17WE](https://openairdocs.org/tcds/A17WE))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA4790NM This certificate issued to: Machen, Inc.

10555 Airport Drive Coeur d'Alene Airport Hayden Lake, ID 83835 Part 23 of the Federal Aviation Regulations.

Original Product -Type Certificate Number: A17WE Make: Piper Model: PA-60-600, -601, -601P, -602P, and -700P Description of Type Design Change: Installation of Cleveland slotted brake disks and heavy duty brake linings in accordance with Machen, Inc. Report No. 65-34, and Parts List 65-34.1, or slotted brake disks, heavy duty brake linings, and heavy duty wheels in accordance with Report No. 65-34, Option 1, and Parts list 65-34.2, or later FAA approved revision. This modification is applicable to the above models as follows:

Model: 600 & 601 Serial Nos.: 0165 to 725 601P 0157 & up 602P & 700P all Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only.

This approval should not be extended to 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. A copy of this Certificate 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.

Date of Application: September 26, 1989 Date Reissued:

Date of Issuance: December 18, 1989 Date Amended: April 20, 1999 FEDERA VIATION of the Administra dre (Signature) TOMINIS TRATION Acting Manager, Sealtle Aircraft Certification Office (Title)

## Every issue (1)

- April 20, 1999: Amended, Current. [certificate](https://openairdocs.org/files/sha256/6c/f3/6cf33667d514e302d9b33def6479ab28217986e8835a14b8cdca458c9b6a341a)

---
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.