STC SA01212SE

Supplemental type certificate · Merlyn Products Inc.

Holder
Merlyn Products Inc. · United States
Status
Current · Amended
Status date
July 2, 2013
Applied
April 5, 2002
Product
Aircraft · Large Multi-Engine
Certification basis
Part 3, Part 21
Data sheet
TCDS6A1

From FAA DRS, with our copy of the certificate PDF. DRS record last changed December 5, 2025.

What it approves

Manufacture of Merlyn 320 Turbo Twin Commander Conversion Kit

What the certificate says

From the PDF’s text layer, without the form’s printed wording. Layout and order may differ; the PDF is the record.

Number SA01212SE

This certificate, issued to Merlyn Products, Inc.

West 7500 Park Drive Spokane, WA 99224-5726 Part 3 of the Civil Air Regulations.

Original ProductType Certificate Number: 6A1 Make: Twin Commander Model: 500B, 500S, 500U

Description of the Type Design Change: Manufacture of Merlyn 320 Turbo Twin Commander Conversion Kit in accordance with Merlyn Products, Inc. Top Drawing List 37-TDL-30, Revision A, dated February 25, 2003, or later Federal Aviation Administration (FAA) approved revision, Installation of either two Lycoming TIO-540-AE2A-MC engines; two Merlyn Products IO-540-MX1-MC engines, Serial Numbers M00106 and M00206; or two Lycoming IO-540-AG1A5-MC engines (See Note); and two Hartzell HC-C3YR-2UF/FC8468( )-6R propellers in accordance with Merlyn Products, Inc. Report 37-30-01, Revision N/C, “Installation Instructions-Airframe,” dated April 7, 2002, or later FAA approved revision, and Maintain in accordance with Merlyn Products, Inc. Report 37-30-ICA, Revision N/C, “Instructions for Continued Airworthiness,” dated May 24, 2013, or later FAA approved revision.

NOTE: To be eligible for installation under this supplemental type certificate (STC), the above engines must have been modified per STC SE01211SE.

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 interrelationship 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 Airplane Flight Manual Supplement 37-30-AFMS, Revision C, dated June 17, 2013, or later FAA-approved revision shall 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: April 5, 2002 Date reissued:

Date of issuance: May 13, 2003 Date amended: March 12, 2009; July 2, 2013

(Signature)

Manager, Seattle Aircraft Certification Office (Title)

ADs that name this STC · 0

An AD can apply because an STC is installed, or mention one in its text.

No AD in this release names this STC

Approved models · 3

MakeModelData sheet
Twin Commander Aircraft Corporation500-B6A1
Twin Commander Aircraft Corporation500-S6A1
Twin Commander Aircraft Corporation500-U6A1

Every issue · 2

DRS keeps each issue of an STC as its own record, with its own certificate and attachments.

DateStatusFiles
July 2, 2013Amended, currentCertificate
March 12, 2009Amended, earlier issueCertificate