# STC ST12455IB

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Airhawke Aérospatial Inc., Canada
- Description: Cabin reconfiguration to add an extra row of business class seating and remove one row of economy seating
- Applied: July 15, 2026
- Status date: August 6, 2026
- Product: Aircraft, Large Airplane
- Certification basis: Part 25
- Foreign approvals: TCCA STC #A-LSA26-118/D, at Issue 1, dated July 15, 2026
- Data sheets: [TCDS A21EA-1](https://openairdocs.org/tcds/A21EA-1)
- Certificate PDF: https://openairdocs.org/files/sha256/7e/34/7e34d94fce67ac3591206bd7be86207203ef45a91f5200f29ca5884ede3e283f
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID134290224520260807174810.0001
- DRS record last changed: August 7, 2026
- Page: https://openairdocs.org/stc/ST12455IB

## ADs that name it (0)

None.

## Approved models (1)

- MHI RJ Aviation ULC CL-600-2D24 (Regional Jet Series 900) ([TCDS A21EA-1](https://openairdocs.org/tcds/A21EA-1))

## 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.

3773 Boulevard Cote-Vertu, Suite 475 Saint-Laurent, Quebec Canada H4R 2M3 Part 25 Title 14, Code of Federal Regulations A21EA-1 MHI RJ Aviation ULC CL-600-2D24 (Regional Jet Series 900)

1. 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.

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

3. This STC is applicable to the following serial numbers for this Make-Model:

15233, 15234, 15239, 15273, 15274 and 15275 07/15/2026 08/06/2026 John Yoo Manager, International Validation Branch Compliance & Airworthiness Division Aircraft Certification Service 3

1. Cabin reconfiguration to add an extra row of business class seating and remove one row of economy seating modification and installation must be in accordance with AlRHAWKE Aérospatial Inc. Master Data List AHK0077MDL001, Revision NC, dated July 15, 2026, or later Transport Canada Civil Aviation (TCCA) approved revisions.

2. Maintenance must be in accordance with AlRHAWKE Aérospatial Inc. Instructions for Continued Airworthiness AHK0077ICA001, Revision NC, dated July 15, 2026, or later TCCA accepted revisions.

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## Every issue (1)

- August 6, 2026: Issued, Current. [certificate](https://openairdocs.org/files/sha256/7e/34/7e34d94fce67ac3591206bd7be86207203ef45a91f5200f29ca5884ede3e283f)

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