# STC SA4589NM-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Learjet Inc, United States
- Description: Installation of dual VLF/Omega H field antennas.
- Applied: November 29, 1989
- Status date: May 7, 2002
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A20EU](https://openairdocs.org/tcds/A20EU)
- Certificate PDF: https://openairdocs.org/files/sha256/e4/f0/e4f02671540c26f3d15b992d267d2dab18837297a10a4e1fb87d47e304d465b4
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CC1140BFEC91459585256CC2000E3D58.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4589NM-D

## ADs that name it (0)

None.

## Approved models (2)

- Fokker Services F.28 Mark 1000 ([TCDS A20EU](https://openairdocs.org/tcds/A20EU))
- Fokker Services F.28 Mark 4000 ([TCDS A20EU](https://openairdocs.org/tcds/A20EU))

## 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: SA4589NM-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: A20EU Make: Fokker Model: 1000, 4000 Description of Type Design Change:

Installation of Dual VLF/Omega H Field Antennas in accordance with AMR Combs, Inc. Drawing List DL- 96610, revision N/C, dated January 3, 1990, or later FAA approved revision.

Approval of this change in type design applies to the above model aircraft only. 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 adverse effect upon the airworthiness of

Date of Application: November 29, 1989 Date Reissued: January 4, 1995 May 7, 2002 Date of Issuance: June 3, 1990 Date Amended:

FEDERAL AVIATION By Direction of the Administrator (Signature) David T. Grossman Program Manager Denver Aircraft Certification Office.

TOMINSTRATO Northwest Mountain Region, Denver, Colorado (Title) fine of not exceeding $1,000, or imprisonment not exceeding 3 years, or both icate may be transfer ed in accordance with FAR 21.47

## Every issue (1)

- May 7, 2002: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e4/f0/e4f02671540c26f3d15b992d267d2dab18837297a10a4e1fb87d47e304d465b4)

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