# STC SA4009NM

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Merlyn Products Inc., United States
- Description: Installation of the Merlyn Products induction air intercooler system on the Piper Aerostars equipped with Lycoming IO-540-AA1A5/-PIA5/-S1A5 engines.
- Applied: May 27, 1987
- Status date: August 16, 1989
- 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/c2/71/c271bc32cd7412106765147b4d37e38f38d8ac7b9927912f299f9f687d4f0416
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/546F81A2674EC2C185256CC2000C6018.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4009NM

## ADs that name it (0)

None.

## Approved models (4)

- 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))

## 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: SA4009NM This certificate issued to: Merlyn Products, INC.

Purt 23 of the Federal Aviation Regulations: Effective 2/1/65, with Amendments 23-1 through 23-6, effective 8/1/67.

Original Product - Type bertificate Number: AITWE Make: Piper Model:

PA-60-600/-601/-601P/-602P Description of Type Design Change: (Aerostar 600/601/601P/602P) Installation of the Merlyn Products, Inc. Induction Air Intercooler System on Piper Aerostars equipped with Lycoming IO-540-AA1A5/-P1A5/-S1A5 engines in accordance with the FAA sealed Merlyn Products Top Drawing List No. 11-TDL-1, dated April 15, 1988, and the induction Air intercooler installation instructions, Report No. l1-1, dated April 15, 1988, or later FAA approved revision.

Approval of this change in type design applies to the above Limitations and Conditions: to other aircraft of this model on which other previously model aircraft only. This approval should not be extended 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, Continuation Sheet and FAA Approved Flight Manual Supplement dated as shown on the Continuation Sheet, must be maintained as part of the permanent records for the modified aircraft.

Date of Application: May 27, 1987 Jute missued:

Date of Issuance: August 19, 1987 Valeunreded: March 29, 1988; May 16, 1988;

FEDERAL AVIATION By direction fUS 89 Stunt 12 Miller (Signature ) ADMI Assistant Manager, Seattle Aireraft Certification Office

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number SAA009NM Limitations and Conditions: (continued) Eligible Eligible Aircraft Lycoming Rotomaster Model Engines Turbochargers PA-60-602P 08/18/87 IO-540-AA1A5 600726-01/-02 PA-60-601P 03/22/88 I0-540-P1A5 600574-01/-02 OR OR Revised 05/16/88 IO-540-S1A5 600575-01/-02 PA-60-601 05/16/88 IO-540-PIA5 600532-01/-02 OR I0-540-S1A5 PA-60-600 05/16/88 I0-540-P1A5 600575-01/-02 OR OR I0-540-S1A5 600532-01/-02 (PAC Option 35) OR 600574-01/-02

- END -

**FAA FORM 8110-2-1 (10-69) PAGE 3 OF 3 PAGES**

## Every issue (1)

- August 16, 1989: Amended, Current. [certificate](https://openairdocs.org/files/sha256/c2/71/c271bc32cd7412106765147b4d37e38f38d8ac7b9927912f299f9f687d4f0416)

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