STC ST04652NY

IMPORT ST04652NY Avmax Aviation Services Inc.

3691 – 19th Street, N.E.

Calgary, Alberta Canada T2E 6S8 Part 25 Title 14 Code of Federal Regulations A13NM De Havilland Aircraft of Canada Limited DHC-8-100 Series; DHC-8-200 Series;

DHC-8-300 Series

1. Installation of the ACSS TCAS 7.1 Upgrade must be in accordance with Avmax Aviation Services Inc.

(Avmax) Engineering Order CE500-401, Issue A, Transport Canada Civil Aviation (TCCA) approved April 22, 2021, or later TCCA approved revision.

2. Operation must be in accordance with Avmax Flight Manual Supplement CE500-801, Issue A, TCCA approved May 3, 2021, or later TCCA approved revision.

(Description of Type Design Change Continued on Page 3 of 3)

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.

(Limitations and Conditions Continued on Page 3 of 3) May 12, 2021 August 3, 2021 Timothy J. Hadsall Acting Manager, New York ACO Branch Compliance & Airworthiness Division Aircraft Certification Service 3

IMPORT ST04652NY ST04652NY 3

IMPORT ST04652NY Date of Issuance: August 3, 2021

Description of Type Design Change (continued):

3. Maintenance must be in accordance with Avmax Maintenance Manual Supplement CE500-701, Issue A, dated April 22, 2021, or later TCCA accepted revision.

4. Definition of the Type Design Change is found in Avmax Master Data List CE500-900, Issue A, TCCA approved April 30, 2021, or later TCCA approved revision.

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-Series.

Certification Basis:

Based on 14 CFR § 21.115 and § 21.101, and the FAA policy for significant changes in FAA Order 8110.48, the certification basis for De Havilland Aircraft of Canada Limited DHC-8-100 Series, DHC-8-200 Series, and DHC-8-300 Series Aircraft is as follows:

a) The type certification basis for the De Havilland Aircraft of Canada Limited DHC-8-100 Series, DHC-8-200 Series, and DHC-8-300 Series Aircraft, as shown on TCDS A13NM for parts not changed or not affected by the change.

b) The type certification basis for the De Havilland Aircraft of Canada Limited DHC-8-100 Series, DHC-8-200 Series, and DHC-8-300 Series Aircraft, as shown on TCDS A13NM for parts changed or affected by the change with the following additional requirements:

i. FAR Part 25 dated February 1, 1965, including Amendments 25-1 through 25-66.

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