# STC SA02013SE - Type: Supplemental type certificate - Status: Current, Issued - Holder: Merlyn Products Inc., United States - Description: Modification of the fuel system, structures, and engine installation - Applied: April 16, 2008 - Status date: July 27, 2009 - Product: Aircraft, Large Multi-Engine - Certification basis: Part 3, Part 21 - Data sheets: [TCDS 6A1](https://openairdocs.org/tcds/6A1) - Certificate PDF: https://openairdocs.org/files/sha256/34/c9/34c9787fdeb2eb6232607257a216d5cc07d9576c5e9b31553413b0b6376583c8 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A35992770EBA0851862576090077C63C.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA02013SE ## ADs that name it (0) None. ## Approved models (5) - Twin Commander Aircraft Corporation 500 ([TCDS 6A1](https://openairdocs.org/tcds/6A1)) - Twin Commander Aircraft Corporation 500-A ([TCDS 6A1](https://openairdocs.org/tcds/6A1)) - Twin Commander Aircraft Corporation 500-B ([TCDS 6A1](https://openairdocs.org/tcds/6A1)) - Twin Commander Aircraft Corporation 500-S ([TCDS 6A1](https://openairdocs.org/tcds/6A1)) - Twin Commander Aircraft Corporation 500-U ([TCDS 6A1](https://openairdocs.org/tcds/6A1)) ## What the certificate says Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record. Number SA02013SE This certificate, issued to: Merlyn Products, Inc. 7500 West Park Drive Spokane, WA 99204-7500 Part 3 of the Civil Air Regulations. Original Product⎯Type Certificate Number: 6A1 Make: Twin Commander Model: 500A, B, S, and U Description of the Type Design Change: Modification of the fuel system, structures, and engine installation to allow a maximum takeoff weight of 7400 pounds. Limitations and Conditions: This modification requires prior or concurrent incorporation of the following Supplemental Type Certificates (STC); SA01212SE (500B, S, and U) or SA01841SE(500A) AND SA00387SE (500B, S, and U) or SA01222SE (500A, B, S, and U). This modification must be maintained in accordance with the Continued Airworthiness section of all appropriate Installation Instructions associated with the applicable STCs. 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 by 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 Airplane Flight Manual Supplement 37-31-AFMS, Revision A, dated July 24, 2009, 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: April 16, 2008 Date reissued: Date of issuance: July 27, 2009 Date amended: (Signature) Acting Manager, Seattle Aircraft Certification Office (Title) Original Signed by Ronald F. May ## Every issue (1) - July 27, 2009: Issued, Current. [certificate](https://openairdocs.org/files/sha256/34/c9/34c9787fdeb2eb6232607257a216d5cc07d9576c5e9b31553413b0b6376583c8) --- 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.