# STC SA546GL

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Twin Commander Aircraft LLC
- Description: Installation of Hartzell Model HC-B3TN-5FL/LT10673 or LT10673B propellers.
- Status date: July 24, 2014
- Data sheets: 2A4, 2A4, 2A4
- Certificate PDF: https://openairdocs.org/files/sha256/fc/f6/fcf64675f1ead761e42d41f9912539ded077d93442a644e5b0ed95dfa12ffe89
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7A4FEE8D9A68A0D286257D24006865B6.0001
- Page: https://openairdocs.org/stc/SA546GL

## ADs that name it

None.

## Approved models (3)

- Twin Commander Aircraft LLC 690 (TCDS 2A4)
- Twin Commander Aircraft LLC 690A (TCDS 2A4)
- Twin Commander Aircraft LLC 690B (TCDS 2A4)

## 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 SA546GL

This certificate, issued to Twin Commander Aircraft LLC 1176 Telecom Drive Creedmoor, NC 27522

Part 3 of the Civil Air Regulations.

Original ProductType Certificate Number: 2A4 Make: Twin Commander Aircraft LLC Model: 690, 690A, and 690B

Description of the Type Design Change: Installation of Hartzell Model HC-B3TN-5FL/LT10673, or LT10673B, propellers in accordance with Gulfstream American Maintenance Manual M690001-2 for the 690 and Gulfstream American Maintenance Manual M690002-2 for the 690A and 690B aircraft.

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 unless the installer determines that the relationship between this change and any other previously incorporated approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. Airplane Flight Manual Supplement (AFMS) dated August 10, 1981, or subsequent FAA-approved revision is required.

A copy of this certificate 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: June 29, 1981 Date reissued: 2/14/90; 5/26/04; 6/15/04; 11/12/09; 7/24/14 Date of issuance: August 10, 1981 Date amended: 2/14/90; 5/26/04; 6/15/04

(Signature)

Manager, Seattle Aircraft Certification Office (Title)

## Every issue (3)

- July 24, 2014: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/fc/f6/fcf64675f1ead761e42d41f9912539ded077d93442a644e5b0ed95dfa12ffe89)
- November 12, 2009: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/7a/07/7a077a8cfa5304bd7265e8eba7b6f46ca2f3361f9fbc7603d73c168ea5c7332a)
- May 26, 2004: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/19/ad/19ad5afbc81bd90c43e7bb507b774bc1f93c9915210aa200b8c3a9d82460e56d)

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From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.