# STC ST12089CH

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Global Aerospace Design Corp, United States
- Description: Premium Economy Class Seat Relocation
- Applied: January 17, 2025
- Status date: July 9, 2026
- Product: Aircraft, Large Airplane
- Certification basis: Part 25
- Data sheets: [TCDS A28NM](https://openairdocs.org/tcds/A28NM)
- Certificate PDF: https://openairdocs.org/files/sha256/dd/6c/dd6cb382d9eaf661f1557951152f73a159b7cf9da8d298764ae971c6504890a3
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID178812746520260710165851.0001
- DRS record last changed: July 10, 2026
- Page: https://openairdocs.org/stc/ST12089CH

## ADs that name it (0)

None.

## Approved models (3)

- Airbus SAS A319-115 ([TCDS A28NM](https://openairdocs.org/tcds/A28NM))
- Airbus SAS A320-214 ([TCDS A28NM](https://openairdocs.org/tcds/A28NM))
- Airbus SAS A320-251N ([TCDS A28NM](https://openairdocs.org/tcds/A28NM))

## 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.

ST12089CH Global Aerospace Design Corp 151 W. 4th Street #50 Cincinnati, OH 45202 Part 25 Title 14 Code of Federal Regulations A28NM Airbus SAS A320-251N, A320-214, A319-115

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

(See Continuation sheet 3) 01/17/2025 07/31/2025 07/09/2026 3 Premium Economy Class Seat Relocation in accordance withMaster Drawing List No. 24GR136-MDL, Revision F, dated February 24, 2026, or later FAA approved revision.

for Mr. Jason S. Deutschman Acting Manager, Central Certification Branch Compliance and Airworthiness Division Aircraft Certificaton Service

ST12089CH 07/09/2026 3

ST12089CH 07/09/2026 Limitations and Conditions (continued):

2. 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.

3. FAA accepted Instructions for Continued Airworthiness No. 24GR136-ICA, Revision E, dated February 24, 2026, or later FAA accepted revision, is required for this modification.

Certification Basis:

See type certificate data sheet A28NM for complete certification basis

------END------ 3 3 Add Page

## Every issue (2)

- July 9, 2026: Amended, Current. [certificate](https://openairdocs.org/files/sha256/dd/6c/dd6cb382d9eaf661f1557951152f73a159b7cf9da8d298764ae971c6504890a3)
- July 31, 2025: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/34/11/34113a89a9519e47d7d014d2db404539f733b1f794e9e3ef5e974263b1e53e94)

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