# STC SA2789NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Learjet Inc, United States
- Description: Installation of dual Universal UNS-1A Flight Management Systems.
- Applied: March 19, 1987
- Status date: March 7, 2002
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A9NM](https://openairdocs.org/tcds/A9NM)
- Certificate PDF: https://openairdocs.org/files/sha256/27/d8/27d8be14e2a6c691e353142e97551a5ee10dbc98dcc10bc2d2e30a7a433c7cd5
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5B9BD77FE62E262085256CC20008C91C.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA2789NM

## ADs that name it (0)

None.

## Approved models (1)

- The Cessna Aircraft Company 650 ([TCDS A9NM](https://openairdocs.org/tcds/A9NM))

## What the certificate says

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

Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA2789NM This certificate issued to: Learjet Inc.

One Learjet Way Wichita, KS 67209 Certifies that the change in the type design for the following product with the limitutions and conditions therefor as specified hereen meet's the airwerthiness requirement's of Part 25 of the Federal Aviation Regulations.

Original Product -Type Certificate Number: A9NM- Make: Cessna Model: 650 Description of Type Design Change:

Installation of dual Universal UNS-1A Flight Management System in accordance with Combs Gates Denver, Inc., drawing list DO-20920 dated June 18, 1987, FAA approved June 30, 1987 or later approved revision.

1. FAA approved Airplane Flight Manual Supplement dated June 30, 1987, or later FAA approved revision is required.

2. This approval should not extend to aircraft of this model on which previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any other previously approved modification will introduce no adverse effect upon the airworthiness of the aircraft.

Date of Application: March 19, 1987 Date Reissued: January 4, 1995, March 7, 2002 Date of Issuance: June 18, 1987 Date Amended:

AVIATION By Direction of the Administrator Geor David T. Grossman (Signature) Acting Manager TOMINIST RATION Northwest Mountain Region, Denver, Colorado Denver Aircraft Certification Office.

(Title)

## Every issue (1)

- March 7, 2002: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/27/d8/27d8be14e2a6c691e353142e97551a5ee10dbc98dcc10bc2d2e30a7a433c7cd5)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.