# STC ST424CH

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Duncan Aviation, United States
- Description: Installation of a Sundstrand Mark V ground proximity warning with windshear detection system.
- Applied: May 31, 1995
- Status date: July 23, 2014
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A46EU](https://openairdocs.org/tcds/A46EU)
- Certificate PDF: https://openairdocs.org/files/sha256/fc/aa/fcaa15f510ff961fedf9a915dc82cf59015141492e27284bbc5dc2696f035d84
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/027B7DE54F5ECB5C86257D2A0049940E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST424CH

## ADs that name it (0)

None.

## Approved models (1)

- Dassault Aviation Mystere-Falcon 900 ([TCDS A46EU](https://openairdocs.org/tcds/A46EU))

## 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.

FAA FORM 8110-2(10-68) PAGE 1 of 2 PAGES Number ST424CH Reissued on July 23, 2014, to supersede the original STC which has been lost or misplaced.

This certificate issued to

Part 21.95 of the Federal Aviation Regulations.

(See Type Certificate Data Sheet No. A46EU for complete certification basis.)

Original Product--Type Certificate Number: A46EU Make: Dassault Aviation Model: Mystere Falcon 900

Installation of a Sundstrand Mark V Ground Proximity Warning with Windshear Detection System: Installed per Kal-Aero Drawing List KA9412-16R, Rev. 0, dated May 31, 1995, or later FAA Approved revisions.

1. Compatibility of this design change with previously approved modifications must be determined by the installer.

2. Airplane Flight Manual Supplement, dated October 10, 1995 or later FAA Approved Revision, is a required part of this STC.

Duncan Aviation 15745 South Airport Road Battle Creek, MI 49015 Date of application : May 31, 1995

Date of issuance : October 10, 1995

Date reissued : July 23, 2014

By direction of the Administrator Original Signed By:

Christopher Richards

(Signature) Timothy Smyth Manager, Propulsion and Program Management Branch Chicago Aircraft Certification Office

(Title)

## Every issue (1)

- July 23, 2014: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/fc/aa/fcaa15f510ff961fedf9a915dc82cf59015141492e27284bbc5dc2696f035d84)

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