# STC SA979NW

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Machen Inc, United States
- Description: Installation of a Lycoming engine, Hartzell propellers, Woodward propeller synchrophasers and unfeathering accumlators, modified pressuriztion system to 4.25 psi, Aero-Air Corporation air conditioning system, 35 ampere hour batteries, interior sound reduction package, aerodynamic performance package and associated systems (See STC for models)
- Applied: August 25, 1978
- Status date: April 10, 1981
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A17WE](https://openairdocs.org/tcds/A17WE)
- Certificate PDF: https://openairdocs.org/files/sha256/11/d8/11d80c548b5d7bb754a24fccf45bf9d65961c0f1296f11b1dccddf35dd58b451
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/82EBAB8BA8B8B4EA86257A3E004EF194.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA979NW

## ADs that name it (0)

None.

## Approved models (1)

- Aerostar Aircraft Corporation PA-60-601 (Aerostar 601) ([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.

Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA979NW This certificate issued to: Machen, INC.

Purt 23 of the Federal Aviation Regulations., effective December 1, 1978.

Original Product - Type Irerificate: Number: AITWE Make: Piper Aerostar Model: 601 (modified) Description of Type Design Change: Installation of a Lycoming LTIO-, T10-540-J2BD (MA)* engines, Hartzell HC-C3YR-2LUF/FJC-8468B-10Q and HC-C3YR-2UF/FC-8468B-10Q or Hartzell HC-C3YR-2LUF/FJC-8468DB-14 and HC-C3YR-2UF/FC-8468DB-14 propellers, Woodward propeller synchrophasers and unfeathering accumulators, modified pressurization system to 4.25 psi, Aero-Air Corporation air conditioning system, 35 ampere hour batteries, interior sound reduction package, aerodynamic performance package, and associated systems in accordance with Machen, Inc. Report No. 66-1.

NOTE: *Modified in accordance with STC SE978NW for duplication in other aircraft. limitation andbenditond Data pertaining to this modification are considered inadequate This approval is limited to the installation in Piper Aerostar 601, Serial Number b1-0060-113, modified with structural cnanges 1r accordance with STC SA2664WE only. A copy of this Certificate and FAA Approvec Airplane Flight Manual Supplement amended April 10, 1981, shall be maintained as part of the permanent records for the modified aircraft.

August 25, 1978 July 16, 1980 Sialecamended: April 10, 1981 FEDERAL AVIATION ion of the Admini Namell M. Pedison (Signature) TOMINISTATIO • Chiet, Seattle Area Aircratt Certification Office (Title)

**FAA FOR 8110-2 (10-68)**

## Every issue (1)

- April 10, 1981: Amended, Current. [certificate](https://openairdocs.org/files/sha256/11/d8/11d80c548b5d7bb754a24fccf45bf9d65961c0f1296f11b1dccddf35dd58b451)

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