# STC ST00204IB

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: STC Twenty One Limited, England
- Description: Installation of Structural Provisions for a Swift Broadband Antenna
- Applied: May 3, 2024
- Status date: June 14, 2024
- Product: Aircraft, Large Airplane
- Certification basis: Part 25
- Foreign approvals: UK 00285
- Data sheets: [TCDS A53NM](https://openairdocs.org/tcds/A53NM)
- Certificate PDF: https://openairdocs.org/files/sha256/e2/cd/e2cd4e331daceff888b28b14a7313ec0d44d490ca444287281e473e0ebfe9025
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID190129064020240620134051.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/ST00204IB

## ADs that name it (0)

None.

## Approved models (2)

- Gulfstream Aerospace LP Galaxy ([TCDS A53NM](https://openairdocs.org/tcds/A53NM))
- Gulfstream Aerospace LP Gulfstream 200 ([TCDS A53NM](https://openairdocs.org/tcds/A53NM))

## 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.

IMPORT ST00204IB STC Twenty One Limited The Waldorf Centre 1290 London Road Alvaston Derby DE24 8QP Part 25 Title 14 Code of Federal Regulations A53NM Gulfstream Aerospace LP GALAXY, GULFSTREAM 200

1. Installation of Structural Provisions for a Swift Broadband Antenna must be in accordance with STC Twenty One Limited Master Document List Doc. No. S21.MDL-1745, Issue 1, dated February 28, 2024, or later United Kingdom Civil Aviation Authority (UK CAA) approved revisions.

(See Description of Type Design Change Continued on Page 3 of 3)

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

(See Limitations and Conditions Continued on Page 3 of 3) May 3, 2024 June 14, 2024 Anthony E. Gallo Manager, International Validation Branch Compliance & Airworthiness Division Aircraft Certification Service 3

**IMPORT ST00204IB 3**

IMPORT ST00204IB Date of Issuance: June 14, 2024

Description of Type Design Change (continued):

2. Maintenance must be in accordance with STC Twenty One Limited Instructions for Continued Airworthiness Doc. No. S21.AMMS-0167, Issue 1, dated February 7, 2024, or later UK CAA approved revisions.

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.

3. This STC is applicable to all serial numbers for this Make-Model.

4. Maintenance must be in accordance with the "Airworthiness Limitations" section of STC Twenty One Limited Instructions for Continued Airworthiness referenced in the Description of Type Design Change section of this STC.

5. This approval is limited to only the Installation of Structural Provisions for a Swift Broadband Antenna. You must get additional approval to install the equipment for which these provisions are intended.

6. The structural analysis and inspection intervals are also applicable when Thrane & Thrane TT3002A Jet-Blade Antenna, P/N: S65-8282-101 or Sensor Systems Inc.

GPS S65-8282-101 (ALT P/N 403002-001) is installed via an approved design change.

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## Every issue (1)

- June 14, 2024: Issued, Current. [certificate](https://openairdocs.org/files/sha256/e2/cd/e2cd4e331daceff888b28b14a7313ec0d44d490ca444287281e473e0ebfe9025)

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