# STC ST93CH-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Garrett Aviation Services, United States
- Description: Modification of the landing gear warning system on aircraft modified with Garrett TFE731 engines and equipped with Collins ADC-85 Air Data Computers, to inhibit landing gear warnings above 160 knots in accordance with AlliedSignal Services drawing M453005, dated 7/1/93, no revisions, or later FAA approved revision.
- Applied: May 17, 1993
- Status date: June 30, 1994
- Product: Aircraft
- Certification basis: Part 21
- Data sheets: [TCDS A7EU](https://openairdocs.org/tcds/A7EU)
- Certificate PDF: https://openairdocs.org/files/sha256/54/3b/543b0f4ea12f56968173d52b491e7ae80fd99d00cc1b9388e1cb01800d2557e2
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FCBD9727CE9E26B4862584CE00707031.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST93CH-D

## ADs that name it (0)

None.

## Approved models (4)

- Dassault Aviation Mystere-Falcon 20 - C5 ([TCDS A7EU](https://openairdocs.org/tcds/A7EU))
- Dassault Aviation Mystere-Falcon 20 - D5 ([TCDS A7EU](https://openairdocs.org/tcds/A7EU))
- Dassault Aviation Mystere-Falcon 20 - E5 ([TCDS A7EU](https://openairdocs.org/tcds/A7EU))
- Dassault Aviation Mystere-Falcon 20 - F5 ([TCDS A7EU](https://openairdocs.org/tcds/A7EU))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: ST93CH-D Garrett Aviation Services This certificate issued to: 2 North Airport Drive Capital Airport Springfield, Illinois 62707 Purt 40 of'the CIVIl Air Regulations. See Type Certificate Data Sheet A7EU for complete certification basis.

Original Product - Type berlificate Number: Make: ATEU Model: Dassault Aviation Description of Type Design Change: Mystere Falcon 20-C5, 20-D5, 20-E5, 20-F5 Modification of the landing gear warning system on aircraft modified with Garrett TFE731 engines and equipped with Collins ADC-85 Air Data Computers, to inhibit landing gear warnings above 160 knots in accordance with AlliedSignal Services drawing M453005, dated 7/1/93, no revisions, or later FAA approved revision.

tirnilalions and bindilions:

This approval should not be extended to other aircraft of these models on which previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those previously approved modifications will introduce no adverse effect on the airworthiness of the aircraft.

/ the Federal Aviation Administration .

Date of Application: Sule wissued:

May 17, 1993 June 30, 1994 Male if issuance: Date Amended:

FEDERAL ANTATION July 29, 1993 . N.Roy, VP & Genera al Manage DHINISTRATO Garrett Aviation Services FAA DAS 1 GL Springfield He §2707 Any alteration of this certificate is punishable by a fine of not exceeding $1,000, or imprisonment not exceeding 3 years, or both This certificate may be transferred in accordance with FAR 21 47 FAA FoRM 6110-2 (10-68)

## Every issue (1)

- June 30, 1994: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/54/3b/543b0f4ea12f56968173d52b491e7ae80fd99d00cc1b9388e1cb01800d2557e2)

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