# STC ST04519NY

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: H4 Aerospace (UK) Ltd., United Kingdom
- Description: Upgrade to Honeywell TRA-100B Transponder
- Applied: May 7, 2020
- Status date: July 15, 2020
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE)
- Certificate PDF: https://openairdocs.org/files/sha256/09/1c/091c27fc5420cef03d68ac00a056e1ae64dfe59e2f84d31d45005dee6c13647c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4FE08B7CFFDE6329862585D90060A2DE.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST04519NY

## ADs that name it (0)

None.

## Approved models (5)

- The Boeing Company 737-600 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))
- The Boeing Company 737-700 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))
- The Boeing Company 737-800 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))
- The Boeing Company 737-900 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))
- The Boeing Company 737-900ER 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 (4/20) SUPERSEDES PREVIOUS EDITION Page 1 of ___

Part of .

IMPORT ST04519NY H4 Aerospace (UK) Ltd.

Blue Court, 39 Queensway Hemel Hempstead, Hertfordshire United Kingdom HP2 5HE 25 Federal Aviation Regulations A16WE BOEING 737-600/-700/-800/-900/-900ER

1. Upgrade to Honeywell TRA-100B Transponder in accordance with H4 Aerospace (UK) Ltd Modification Summary Sheet H4A1875, Issue 9, dated March 18, 2020, or later EASA approved revisions.

2. Aircraft operation in accordance with H4 Aerospace (UK) Ltd Airplane Flight Manual Supplement H4AFMS047, Issue 05, dated March 23, 2020, or later EASA approved revisions.

3. Maintenance in accordance with H4 Aerospace (UK) Ltd Instructions For Continued Airworthiness H4AICA003, Issue 6, dated April 03, 2020, or later EASA accepted revisions.

1. The installer must determine whether this design change is compatible with previously approved modifications.

2. If the holder agrees to permit another person to use the certificate to alter the product, the holder shall give the other person written evidence of that permission.

05/07/2020 07/15/2020 Timothy J. Hadsall Acting Manager New York ACO Branch 1

## Every issue (1)

- July 15, 2020: Issued, Current. [certificate](https://openairdocs.org/files/sha256/09/1c/091c27fc5420cef03d68ac00a056e1ae64dfe59e2f84d31d45005dee6c13647c)

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