# STC SA00387SE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Merlyn Products Inc., United States
- Description: Modification of the existing fuel system to increase its capacity by the installation of additional fuel tanks and associated hardware
- Applied: July 17, 1996
- Status date: November 12, 1996
- Product: Aircraft
- Certification basis: Part 21
- Data sheets: [TCDS 6A1](https://openairdocs.org/tcds/6A1)
- Certificate PDF: https://openairdocs.org/files/sha256/7a/f6/7af678c308b0f32c7ffada906c015dfc94934da680cc050786944114f9ec167e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D006FEDD80F8486E862579A7006B0501.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA00387SE

## ADs that name it (0)

None.

## Approved models (4)

- Twin Commander Aircraft LLC 500 ([TCDS 6A1](https://openairdocs.org/tcds/6A1))
- Twin Commander Aircraft LLC 500-B ([TCDS 6A1](https://openairdocs.org/tcds/6A1))
- Twin Commander Aircraft LLC 500-S ([TCDS 6A1](https://openairdocs.org/tcds/6A1))
- Twin Commander Aircraft LLC 500-U ([TCDS 6A1](https://openairdocs.org/tcds/6A1))

## 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: SA00387SE 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: 500 B, S, and U Description of Type Design Change: Modification of the existing fuel system to increase its capacity by the installation of additional fuel tanks and associated hardware per Merlyn Products, Inc., Top Drawing List 38-TDL-1, Rev. N/C dated October 17, 1996, 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 other 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 Airplane Flight Manual Supplement dated November 12, 1996, must be maintained as part of the permanent records for the modified aircraft.

Date of Application: July 17, 1996 Date Reissued:

Date of Issuance: November 12, 1996 Date Amended:

AVIATION direction o the Slantinist (Signature) HOMINIST RATION Acting Manager, Seaftle Aircraft Certification Office (Title)

## Every issue (1)

- November 12, 1996: Issued, Current. [certificate](https://openairdocs.org/files/sha256/7a/f6/7af678c308b0f32c7ffada906c015dfc94934da680cc050786944114f9ec167e)

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