# STC SA09247AC

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Twin Commander Aircraft LLC, United States
- Description: Replace the engine exhaust ejector assembly, P/N 260042-55 LH & P/N 260042-56 RH, with a heavier gauge ejector which has a modified fairing.
- Applied: August 14, 1996
- Status date: July 24, 2014
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS 2A4](https://openairdocs.org/tcds/2A4)
- Certificate PDF: https://openairdocs.org/files/sha256/ca/f4/caf4bae3268784b4e9b624886013a3294382153725b8ef15ed3e0cf55b7b5f0f
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D234E56F0BE9165C86257D240067D59E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09247AC

## ADs that name it (0)

None.

## Approved models (3)

- Twin Commander Aircraft LLC 690 ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 690A ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 690B ([TCDS 2A4](https://openairdocs.org/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 SA09247AC

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: Gulfstream Model: 690, 690A, 690B

Description of the Type Design Change: Replace the engine exhaust ejector assembly, Part Number (P/N) 260042-55 LH, and P/N 260042-56 RH, with a heavier gauge ejector which has a modified fairing in accordance with The ServiCenter Drawing SC-700, Initial Release, dated August 1, 1996. This modification is applicable to Twin Commander Model 690, Serial Numbers (S/N) 11025 and 11070 through 11099, and Models 690A and 690B, S/N 11100 through 11599.

Limitations and Conditions: Compatibility of this design change with previously approved modifications must be determined by the installer. Approval of this change in type design applies to the above aircraft model only.

This approval should not be extended to other aircraft of this model series 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.

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: August 14, 1996 Date reissued: 9/16/97; 5/26/04; 11/12/09; 7/24/14 Date of issuance: November 1, 1996 Date amended: May 26, 2004

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

(Signature)

Manager, Seattle Aircraft Certification Office (Title)

## Every issue (3)

- July 24, 2014: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/ca/f4/caf4bae3268784b4e9b624886013a3294382153725b8ef15ed3e0cf55b7b5f0f)
- November 9, 2009: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/76/59/7659e7251198dd13d4de92f38d28f6ece8b145b18a44094753e880a46f9cd9cd)
- May 26, 2004: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/eb/86/eb8657446699e27bb5c32dc5f54a805793884bbc9c298bb6c7df2aa5df59ad98)

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