# STC SA4021NM

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Machen Inc, United States
- Description: Installation of Machen temperature monitoring system.
- Applied: February 25, 1987
- Status date: November 1, 1998
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A17WE](https://openairdocs.org/tcds/A17WE)
- Certificate PDF: https://openairdocs.org/files/sha256/44/c9/44c9827b0bca7a7f7af12d157aa119f23d4d078856d24efd6bb0f17fd8c13ea4
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0D4909C03CF0B2A485256CC2000C6035.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4021NM

## 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: SA4021NM This certificate issued to: Machen, Inc.

10555 Airport Drive Coeur d'Alene Airport Hayden Lake, ID 83835 Certifies that the change in the type design for the following product with the limitations and conditions therefor as specified hereon meets the airworthiness requirement's of Part 23 of the Federal Aviation Regulations. Effective February 1, 1965, Amendments 23-1 through 23-6.

Make. Aerostar Model: PA-60-600, 601, 601P, 602P, 700P Description of Type Design Change: Installation of Machen, Inc., Temperature Monitoring System in accordance with Machen, Inc., Report 78-1, Revision A, dated June 1, 1987, or later FAA approved revsion.

Note: Machen, Inc., Temperature Monitoring Systems are considered secondary instruments and shall not be used as primary instruments.

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. 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: February 25, 1987 Date Reissued:

Date of Issuance: October 1, 1987 Date Amended: 11/04/87; 11/01/98 FEDER SIATION directi the Idmini тики 40.5 (Signature) TOMAISY RA TIDA Acting Manager, Seattle Aircraft Certification Office (Title)

## Every issue (1)

- November 1, 1998: Amended, Current. [certificate](https://openairdocs.org/files/sha256/44/c9/44c9827b0bca7a7f7af12d157aa119f23d4d078856d24efd6bb0f17fd8c13ea4)

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