# STC ST122244IB

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Alamo Engineering GmbH, Germany
- Description: Installation of Gogo Galileo system, including HDX Antenna
- Applied: July 18, 2025
- Status date: December 18, 2025
- Product: Aircraft, Large Airplane
- Certification basis: Part 25
- Foreign approvals: EASA 10087487 Rev 0
- Data sheets: [TCDS T00012WI](https://openairdocs.org/tcds/T00012WI)
- Certificate PDF: https://openairdocs.org/files/sha256/f6/59/f6598ac2fc2472a545dbe8655cdc77fee314f96ce5569be182bdec85b013b005
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID109555006320251222144250.0001
- DRS record last changed: December 22, 2025
- Page: https://openairdocs.org/stc/ST122244IB

## ADs that name it (0)

None.

## Approved models (1)

- Textron Aviation Inc. 680A ([TCDS T00012WI](https://openairdocs.org/tcds/T00012WI))

## 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 8110-2 (10/24) Page 1 of ___ IMPORT ST12244IB Alamo Engineering GmbH Zeppelinstrasse 16A 82205 Gilching, Germany Part 25 Title 14, Code of Federal Regulations T00012WI Textron Aviation 680A

1. This STC is applicable to all serial numbers for the Textron Model 680A.

(See Limitaitons and Conditions continued on page 3 of 3)

07/18/2025 12/18/2025 John Yoo Manager, International Validation Branch Compliance & Airworthiness Division Aircraft Certification Service 3

1. Installation of Gogo Galileo system, including HDX Antenna, on Textron Model 680A aircraft in accordance to Alamo Engineering Master Document List number MDL24A39AE-01, Revision A, dated July 2, 2025, or later EASA approved revision.

(See Description of Type Design Change continued on page 3 of 3)

2. Maintenance in accordance with Alamo Engineering Instructions for Continued Airworthiness document number ICA24A39AE-01, Revision A, dated July 1, 2025, or later EASA accepted revision.

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

3. Maintenance must be in accordance with the Airworthiness Limitations Section of the Instructions for Continued Airworthiness identified in the Description section of this STC.

4. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission.

Certification Basis:

The certification basis for this modification is based upon Part 25 as specified in Type Certificate Data Sheet (TCDS) T00012WI, except for the areas changed or affected by the design change, for which the certification basis is the TCDS plus:

Later Amendments:

14 CFR 25.177 at Amendment 25-135

Equivalent level of safety findings have been made for the following regulations:

14 CFR 25.251(b) - use of a combination of aerodynamic analysis and flight test in lieu of flight test to the conditions required by 25.251(b), documented in ELOS Memorandum ST20212IB-T-25.251(b)

This modification has been determined to be a no acoustic change in accordance with 14 CFR

21.93(b).

----------------------------------------------------- End ----------------------------------------------------- 3 3 Add Page

## Every issue (1)

- December 18, 2025: Issued, Current. [certificate](https://openairdocs.org/files/sha256/f6/59/f6598ac2fc2472a545dbe8655cdc77fee314f96ce5569be182bdec85b013b005)

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