# STC ST439CH-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Duncan Aviation Inc, United States
- Description: Installation of dual AlliedSignal GNS-XLS Flight Management Systems.
- Applied: July 1, 1996
- Status date: September 24, 2008
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A7EU](https://openairdocs.org/tcds/A7EU)
- Certificate PDF: https://openairdocs.org/files/sha256/f5/af/f5af3226a8a87927fe1cf748d3ebe22a946b257ac7e5f0342a700cd8b28dce75
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/69FAB048315057398625794F0064A256.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST439CH-D

## ADs that name it (0)

None.

## Approved models (1)

- Dassault Aviation Mystere-Falcon 200 ([TCDS A7EU](https://openairdocs.org/tcds/A7EU))

## 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.

Part 4b of the Civil Air Regulations.

Original Product--Type Certificate Number

Installation of dual AlliedSignal GNS-XLS Flight Management Systems in accordance with Kal-Aero Drawing List KA9606-21R, Revision B, dated June 22, 1998, or later FAA approved revision.

1. FAA approved Airplane Flight Manua l Supplement, KA9606-25R, Revision B, dated June 22, 1998, FAA approved June 24, 1998, or later FAA approved revision is required.

2. FAA approved Airplane Maintenan ce Manual Supplement, KA9606-26R, Revision , dated August 7, 1996, FAA approved August 7, 1996, or later FAA approved revision is required.

3. Compatibility of this design change with previously appr oved modifications must be determined by the installer.

4. A copy of this Certificate, Maintenan ce Manual Supplement, and Flight Manual Supplement must be maintained as part of the permanent records of the modified aircraft.

5. 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.

Duncan Aviation Inc.

3701 Aviation Rd.

Lincoln, NE 68524 A7EU Make : Dassault Aviation Model : Mystere-Falcon 200 Date of application : July 1, 1996

Date of issuance : August 15, 1996 Date reissued : February 16, 1999, September 24, 2008

Date amended : September 15, 1997

Original signed by Steve Simpson

( Signature) Steven K. Simpson DAS Administrator, DAS-501013-CE Duncan Aviation, Lincoln, Nebraska

( Title)

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

Transfer the ownership of Supplemental Type Certificate Number

to (Name of transferee)

(Address of transferee) (Number and street)

(City, State, and Zip code)

from (Name of grantor) (Print or type)

(Address of grantor) (Number and street)

(City, State, and Zip code)

Signature of grantor (In ink):

## Every issue (1)

- September 24, 2008: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/f5/af/f5af3226a8a87927fe1cf748d3ebe22a946b257ac7e5f0342a700cd8b28dce75)

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