STC ST11370DS

ST11370DS Altitude Aerospace USA 12256 SW Garden Pl Portland, OR 97223 Part 25 the Title 14, Code of Federal Regulations A21EA-1 MHI RJ Aviation ULC CL-600-2B19 See cont. sheet 3

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

(See Continuation Sheet 3 of 4) 04/02/2024 04/10/2025 08/26/2026 04/09/2025 10/01/2025 for Jason S. Deutschman Acting Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 4 Installation of a Cabin Interior Reconfiguration in accordance with Master Data List MDL-CR2E1-017, Revision H, dated September 18, 2025, or later FAA approved revision.

ST11370DS 08/26/2026 4

ST11370DS 08/26/2026 Model (Continued):

(Regional Jet Series 100 & 440)

2. Airplane Flight Manual Supplement, Doc. number, AFMS-CR2E1-001, rev. A dated 10/01/2025 or later FAA approved rev. is required to be on board the modified aircraft for the -01, 18 passenger interior configuration.

Airplane Flight Manual Supplement, Doc. number, AFMS-CR3E1-001, rev. IR dated 10/01/2025 or later FAA approved rev. is required to be on board the modified Aircraft for the -02, 19 passenger interior configuration.

3. Instructions for Continued Airworthiness with Airworthiness Limitations, Document No.

ICA-CR2E1-013, revision B dated July 30, 2025, or later FAA approved revision is required for this modification.

4. STC ST02541NY "Floor Path Marking System" is a prerequisite for the application of this STC.

5. 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:

Based on 14 CFR §21.115, 21.101 and the FAA policy for significant changes in FAA Order 8110.48A, the certification basis for the MHI RJ Aviation ULC, model CL-600-2B19 (Regional Jet Series 100 & 440) aircraft, Installation of a Cabin Interior Reconfiguration is as follows:

a. The type certification basis for the MJI RJ Aviation ULC, model CL-600-2B19 (Regional Jet Series 100 & 440) is shown on TCDS A21EA-1 for parts not changed or not affected by the change.

b. The certification basis for parts changed or affected by the change since the reference date of application, April 2, 2024, is based upon TCDS A21EA-1. Based on 14 CFR §21.115 and

21.101, and the FAA policy for significant changes in FAA Order 8110.48A, the certification basis for this modification was determined to be:

ST11370DS 08/26/2026 Certification Basis (Continued):

Regulations at amendment level in TCDS A21EA-1:

14 CFR §25.1 25-0, 25.29 25-42, 25.301 (a-c) 25-23, 25.303 25-54, 25.305 (a, b) 25-54, 25.307 (a, b) 25-54, 25.365 (c, g) 25-54, 25.561 (a-c) 25-23, 25.571 (a, b) 25-54,

25.581 (a-c) 25-23, 25.601 25-0, 25.603 (a-c) 25-46, 25.605 (a) 25-46, 25.607 (a-c) 25-23,

25.609 (a, b) 25-0, 25.611 25-23, 25.613 (a-e) 25-46, 25.619 (a, b) 25-23, 25.623 (a, b) 25-0,

25.625 (a-d) 25-23, 25.783 (a, b, e, h, j) 25-54, 25.785 (a-e, i, j) 25-51, 25.787 (a, b) 25-51,

25.789 (a) 25-46, 25.791 25-32, 25.793 25-51, 25.801 (a, b) 25-0, 25.807 (a, b, c, d2) 25-55,

25.809 (c) 25-47, 25.811 (a-e, g) 25-46, 25.812 (a, b, c-f) 25-58, 25.813 (a, b, c 1) 25-46, 25.815 25-38, 25.817 25-15, 25.831 (a) 25-41, 25.851 (a, b) 25-54, 25.853 (a-f) 25-61, 25.1301 (a-d) 25-0, 25.1307 (a, c, h) 25-54, 25.1309 (a-d, g) 25-41, 25.1351 (a1, d1-3) 25-41, 25.1353 (a, b) 25-42, 25.1357 (a, c, e) 25-0, 25.1359 (d) 25-32, 25.1411 (a, b, d, e, f, g) 25-53, 25.1415 (a-d) 25-52, 25.1431 (a, c) 25-0, 25.1447 (a, b, c1, c3, i) 25-41, 25.1501 (a, b) 25-42, 25.1519 25-0,

25.1529 25-54, 25.1541 (a, b) 25-0, 25.1557 (d) 25-38, 25.1561 (a-e) 25-46, 25-1581 (a2, b, d) 25-42, 25.1583 (c) 25-46.

Regulations at a later amendment level than TCDS A21EA-1:

14 CFR § 25.899 (a, b) 25-123, 25.1360 (a, b) 25-123, 25.1438 (a, c) 25-41

14 CFR Part 26 Regulations:

Based on 14 CFR § 21.101(g), applicable provisions of 14 CFR Part 26 are included in the certification basis. For any future 14 CFR Part 26 amendments, the holder of this STC must demonstrate compliance with the applicable sections. As of the issuance date of this STC, compliance has been found for the following regulations:

14 CFR § 26.1 (a, b2) 26-0, 26.11 (a, c, d5) 26-0, 26.47 (a-c, e) 26-1.

Regulations for Amendment:

14 CFR § 25.771 25-4, 25.777 25-46, 25.813 (f) 25-46, 25.1322 (b) 25-38.

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