# STC SA4590NM-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Learjet Inc., United States
- Description: Installation of a Universal CVR 30 or cockpit voice recorder.
- Applied: February 6, 1990
- Status date: December 23, 2015
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A10CE](https://openairdocs.org/tcds/A10CE)
- Certificate PDF: https://openairdocs.org/files/sha256/42/32/423205118b943d03ad14c09f7de671469d88c074adf66027cbc811399fe89203
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/72977CB498744AC286258314005D9D54.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4590NM-D

## ADs that name it (0)

None.

## Approved models (4)

- Learjet Inc. Learjet 24 ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. Learjet 25 ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. Learjet 35 ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. Learjet 36 ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))

## 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.

SA4590NM-D

Learjet Inc.

One Learjet Way Wichita, Kansas 67209 25*

A10CE

Learjet

24, 25, 35, 36

Installation of a Universal Navigation Corporation CVR 30 or CVR 80 Cockpit Voice Recorder in accordance with FAA approved Drawing List DL-03685, revision A, dated October 2, 1991, or later FAA approved revision.

1. Equipment rack STC No. SA4598NM-D or other FAA approved equipment rack is required.

2. 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 that aircraft

February 26, 1990

June 8, 1990

January 4, 1995; June 13, 2002;

December 23, 2015 October 9, 1991

Original signed by Keith Johnston

(Signature) Keith Johnston ODA administrator ODA-501508-CE, Learjet Inc.

Wichita, Kansas (Title)

NOTE:

**DO NOT DELETE THIS PAGE.**

**DO NOT ADD ANY DATA TO THIS PAGE.**

**THIS PAGE IS FOR PAGE NUMBERING PURPOSES, PLEASE DISCARD PRINTED COPY.**

(STC No.)

## Every issue (1)

- December 23, 2015: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/42/32/423205118b943d03ad14c09f7de671469d88c074adf66027cbc811399fe89203)

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