# STC SA4593NM-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Learjet Inc, United States
- Description: Installation of provisions for Honeywell TCAS/Mode S/VSI/TRA system.
- Applied: April 9, 1990
- Status date: May 7, 2002
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A13NM](https://openairdocs.org/tcds/A13NM)
- Certificate PDF: https://openairdocs.org/files/sha256/37/59/3759dc3f18597857a378559e726ea24cc70e54e2046533e8c2d3188925f557e6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/37F4D3BFB0C7CF2485256CC2000E3D64.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4593NM-D

## ADs that name it (0)

None.

## Approved models (2)

- Bombardier Inc. DHC-8-102 ([TCDS A13NM](https://openairdocs.org/tcds/A13NM))
- Bombardier Inc. DHC-8-103 ([TCDS A13NM](https://openairdocs.org/tcds/A13NM))

## 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: SA4593NM-D This certificate issued to:

Learjet Inc.

One Learjet Way Wichita, Kansas 67209 Part 25 of the Federal Aviation Regulations.

Original Product -Type Certificate Number: A13NM Make: de Havilland Model: DHC 8-102 and -103 Description of Type Design Change:

Installation of provisions for Honeywell TCAS/Mode S/VSI/TRA System in accordance with AMR Combs, Inc. Drawing List DL 1703000, revision N/C, dated April 23, 1990, FAA approved October 23, 1990, or later approved revision.

1. This approval should not be extended to aircraft of this model on which previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any of those other previously approved modifications including changes in type design, will introduce no

2. A copy of this certificate must be maintained as part of the permanent records for the modified aircraft. adverse effect upon the airworthiness of that aircraft.

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.

surrendered, suspended, revoked, or a termination date is otherwise established by the Administrator of Date of Application: April 9, 1990 Date Reissued: January 4, 1995 May 7, 2002 Date of Issuance: September 7, 1990 Date Amended: August 13, 1998 FEDERAL AVIATION By Direction of the Administrator (Signature) David T. Grossman Program Manager * Denver Aircraft Certification Office.

TOMINSTRATO Northwest Mountain Region, Denver, Colorado (Title)

## Every issue (1)

- May 7, 2002: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/37/59/3759dc3f18597857a378559e726ea24cc70e54e2046533e8c2d3188925f557e6)

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