# STC SA2-89

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Signature Flight Support Corporation, United States
- Description: Installation of Lycoming GO-480-C1D6 engines and Hartzell HC 83X20-2C/8833-2 propellers.
- Applied: November 9, 1956
- Status date: August 31, 2000
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 6A1](https://openairdocs.org/tcds/6A1)
- Certificate PDF: https://openairdocs.org/files/sha256/0f/2d/0f2db657b353127db16bebed856e6870b864568c15d0190614adf6591452249d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2B81CEE427C43F9485256CC10083D4F7.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA2-89

## ADs that name it (0)

None.

## Approved models (1)

- Twin Commander Aircraft LLC 560 ([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.

JHntteb jStateo of (Afaurfitm ,AJmtmTstraium Certificate SA2-89 Signature Flight Support Corporation, a Delaware Corporation 7511 Lemmon Avenue, Hangar C Dallas, TX 75209 Civil Air 6A1 Gulfstream American 560 Installation of Lycoming 6O-480-C1D6 engines and Hartzell HC 83x20-2C/8833-2 propellers in accordance with data listed on Dallas Aero Service Drawing List titled "GO-480-C1D-6 Engine Installation in 560," Revision 2, dated 6/28/57, Dallas Aero Service Drawing Ho. A-101001 dated 2/19/57.

Dallas Aero Service Commander Model 560 Airplane Flight Manual Appendix No. 3 dated 2/16/57 is required.

Compatibility of this modification with other previously approved modifications must be determined by the installer.

-November 09, 1956 28, 1957 " '*"*"' . 6/1/92; 12/21/98; 8/31/00 .- 12/5/68 ; 11/12/69;

2/23/72; 5/26/78; 4/10/81; 3/2/82 Rev. 6 S. Frances Cox Manager, Special Certification Office, Southwest Region (Title) liny aitflttloi. of ChJj cfitlficttf Is punlidabl* by 3 fine of not •ueeedlnj $1,000, or iBprljonnent not eic»i)Jng 3 , or both.

FAA Fo» eilD-!(10-«e) Ihij certjffcjt* «ny toe Cr*niferrM In

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (A ddrtss of transferee) ————————————————————t Nltmber and i (City, Stair, and £1P cade I from (Name of grantor) (Print or type) (Address of grantor) i and itrftl J (City, State, and £IP auk j Extent of Authority (if licensing agreement):.

Signature of grantor (In ink):

**C FAA AC 6S-S538**

## Every issue (1)

- August 31, 2000: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/0f/2d/0f2db657b353127db16bebed856e6870b864568c15d0190614adf6591452249d)

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