# STC SA4718NM - Type: Supplemental type certificate - Status: Current, Amended - Holder: Machen Inc, United States - Description: Installation of a pneumatic door seal pressure system. - Applied: January 4, 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/sha256/62/34/6234e211c904885823e559245f5f9abb6e366cd00bc37680151ddc4924931d8b - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D534AB7AFC5D0E0D85256CC2000E3E28.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA4718NM ## ADs that name it (0) None. ## Approved models (3) - 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: SA4718NM 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. Original Product - Type Certificale Number: A17WE Make: Piper Model: PA-60-601P, -602P, and -700P Description of Type Design Change: Installation of a pneumatic door seal pressure system in accordance with Machen, Inc. Installation Instructions Report No. 65-30, dated March 15, 1989, or later FAA approved revision. 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 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 Airplane Flight Manual Supplement (AFMS), dated April 14, 1989, 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. Date of Application: January 4, 1989 Date Reissued: Date of Issuance: April 14, 1989 Date Amended: April 20, 1999 FEDERA AVIATION By Direction of the Administrator (Signature) TOMINIST RATION Acting Manager, Seattle Aircraft Certification Office (Title) **FAA FORM B110-2(10-68)** ## Every issue (1) - April 20, 1999: Amended, Current. [certificate](https://openairdocs.org/files/sha256/62/34/6234e211c904885823e559245f5f9abb6e366cd00bc37680151ddc4924931d8b) --- 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.