# STC ST00139AT

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Honeywell International Inc, United States
- Description: Installation of a MUA-45 Data Link System.
- Applied: October 5, 1992
- Status date: January 4, 2022
- Product: Aircraft, Large Airplane
- Certification basis: Part 21, Part 21, Part 21, Part 21, Part 21, Part 21, Part 21, Part 25
- Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE)
- Certificate PDF: https://openairdocs.org/files/sha256/ba/9f/ba9fee18f9c6e56e5016c1406efea75831d1866fd37e183901b0dde6da6626b8
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID180174448520221208142522.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST00139AT

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 737-400 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))

## 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.

FAA Form 8110-2 (11/20) SUPERSEDES PREVIOUS EDITION Page 1 of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number:

ST00139AT Honeywell International Inc.

21111 N 19th Ave Phoenix, Arizona 85027 Part 25 Federal Aviation Regulations A16WE Boeing 737-400 Installation of a MUA-45 Data Link System in accordance with Master Drawing List No.

699-50051, Revision B, dated September 5, 1995, or later FAA approved revision.

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

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.

October 5, 1992 July 27, 2000; January 4, 2022 March 4, 1993 For Acting Manager, Seattle ACO Branch 2

FAA Form 8110-2 (11/20) SUPERSEDES PREVIOUS EDITION Page 2 of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number:

ST00139AT 2

## Every issue (3)

- January 4, 2022: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/ba/9f/ba9fee18f9c6e56e5016c1406efea75831d1866fd37e183901b0dde6da6626b8)
- January 4, 2022: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/c6/f1/c6f1c25474a8524c19ed39b374a18a684fed7559dc7a1766560c5fae5fc5ab9e)
- July 27, 2000: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/9a/3f/9a3f4753b243d0a980eb66725e37bfe61d4eaa18e5e39da8968bf937ab706790)

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