STC ST12397NY

1337 Townline Road Abbotsford, British Columbia Canada V2T 6E1 Part 25 Title 14, Code of Federal Regulations A21EA-1 MHI RJ Aviation ULC CL-600-2B19

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 all serial numbers for this Make-Model.

(See continuation sheet 3) 11/16/20 5/18/26 John Yoo Manager, International Validation Branch Compliance & Airworthiness Division Aircraft Certification Service 4

1. Installation of Class E Freighter Cargo Conversion must be in accordance with Cascade Aerospace Inc.

Engineering Order EO3683, Revision 1, dated July 9, 2020 and Master Document List MDL 3683, Revision 26, dated 2021-05-12, or later Transport Canada Civil Aviation (TCCA) approved revisions.

2. Operation must be in accordance with Cascade Aerospace Inc. Flight Manual Supplement AFMS 3683, Revision 2, dated April 2, 2026, or later TCCA approved revision.

3. Maintenance must be in accordance with Cascade Aerospace Inc. Maintenance Requirements Manual Supplement MRMS 3683, Revision 5, dated August 28, 2020, or later TCCA accepted revision.

4. Operation must be in accordance with the Limitations section of the Flight Manual Supplement referenced in the Description of Type Design Change section of this STC.

5. Maintenance must be in accordance with Part 2 - Airworthiness Requirements section of the Maintenance Requirements Manual Supplement referenced in the Description of Type Design Change section of this STC, TCCA approved October 22, 2008, or later TCCA approved revision.

6. FAA STC ST01732SE lightweight window plugs installation is required as a co-requisite to this STC per Cascade Aerospace Inc. Engineering Order EO3835.

Note: This STC does not require a new or revised Electrical Wiring Interconnection System (EWIS) Instructions for Continued Airworthiness (ICA).

Certification Basis:

Based on Title 14, Code of Federal Regulations (14 CFR) 21.115 and 21.101, and the related policy, Advisory Circular (AC) 21.101-1B and Order 8110.48A, the type certification basis for the modified MHI RJ Aviation ULC CL-600-2B19 is as follows:

a. The type certification basis for the MHI RJ Aviation ULC CL-600-2B19 is shown on Type Certificate Data Sheet (TCDS) A21EA-1 for parts not changed or not affected by the change.

b. The type certification basis for the MHI RJ Aviation ULC CL-600-2B19 for parts changed or affected by the change is shown on TCDS A21EA-1 except as follows:

§ 25.613 at Amendment 25-112 § 25.869 at Amendment 25-113 § 25.981 at Amendment 25-102 § 25.1438 at Amendment 25-41 § 26.11 at Amendment 26-0 § 26.47 at Amendment 26-7

Additional Design Requirements and Conditions per § 21.21(b)(2):

Protection of critical systems and the EWIS components required for continued safe flight and landing, located in, or in close proximity to the Class E compartment has been accomplished by locating flight control cables, critical wiring and other electrical wiring interconnection system (EWIS) components, windows, the flight data recorder (FDR), and the cockpit voice recorder (CVR) outside of cargo compartment to adequately protect from the effects of a main deck cargo fire.

----------END---------- 4 4