# STC ST437CH-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Duncan Aviation Inc, United States
- Description: Installation of AlliedSignal GNS-XLS flight management system.
- Applied: March 22, 1996
- Status date: December 29, 2008
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A12EA](https://openairdocs.org/tcds/A12EA)
- Certificate PDF: https://openairdocs.org/files/sha256/3f/70/3f709f652e52f765562a26e4ed2bbcd876c3f23a62830974f1b52d5aa3a24940
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/853FA61B3495FFCC8625794F0064498E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST437CH-D

## ADs that name it (0)

None.

## Approved models (1)

- Gulfstream Aerospace Corporation G-1159 ([TCDS A12EA](https://openairdocs.org/tcds/A12EA))

## 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.

Description of Type Design Change: Installation of AlliedSignal GNS-XLS Flight Management System.

Data Required: (1) Kal-Aero, Inc., Master Drawing List, No. KA9603-01R, Revision A, dated May 24, 1996; Kal-Aero, Inc., FAA Approved Airplane Flight Manual Supplement, No. KA9603-05R, Revision A, dated May 24, 1996 or later FAA approved revisions to (1) or (2).

Limitations and Conditions: Compatibility of this design change with previously approved modifications must be determined by the installer.

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 Road Lincoln, NE 68524 A12EA Make : Gulfstream Aerospace Corporation Model : G-1159 Date of application : March 22, 1996

Date of issuance : May 29, 1996 Date reissued : June 25, 1996 December 29, 2008 Date amended : May 29, 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)

- December 29, 2008: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/3f/70/3f709f652e52f765562a26e4ed2bbcd876c3f23a62830974f1b52d5aa3a24940)

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