STC SA04724NY

SA04724NY DH2 Floats, LLC 135 Sweet Leaf Grove Lane Conroe, TX 77384 CAR 03 Civil Aeronautics Regulations A-806 Viking Air Limited DHC-2 MK. III

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

(Limitations and Conditions continued on page 3 of 3) 10/27/2021 04/03/2026 09/22/2023 Michael Linegang Manager, East Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 3

1. Installation of Aerocet 6650 amphibious floats in accordance with Aerospace Design & Compliance, LLC Master Data List DHC2-MDL-0089, revision IR, dated 9/21/23 or later FAA approved revision.

2. Operate in accordance Airplane Flight Manual Supplement Report Number 53-511-25-01, revision IR, dated: 9/20/23 or later FAA approved revision (Description of Type Design Change continued on Page 3 of 3)

SA04724NY 04/03/2026 3

SA04724NY 04/03/2026 Description of Type Design Change continued:

3. Maintain in accordance with Instructions for Continued Airworthiness, document 53-511-24-01, revision A, dated: 7/13/23, or later FAA accepted revision.

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. This STC is applicable to all serial numbers for the Make: Viking Air Limited Model DHC-2 MK.III with the following prerequisite STC's installed:

STC SA945NE: Gross weight increase from 5,370 lbs.to 6,000 lbs.

STC SA620NE: Installation of PT6A-27, PT6A-15AG, or PT6A-34 engine.

STC SA02275SE: Installation of an increased landing weight modification to 6,000 lbs.

STC SA1723GL: Installation of flow energizers.

STC SA309CH: Installation of Wipaire Model 6000 Floats.

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 all of the eligible aircraft models is as follows:

1. The type certification basis for Viking Air Limited, Model DHC-2 Mk. III airplane is shown on the TCDS A-806 for parts not changed or not affected by the change.

2. The certification basis for parts changed or affected by the change since the reference date of application, October 27, 2021, is based upon CAR-03, dated: 13 NOV1945. except for those 14 CFR part 23 regulations listed following.

Regulations at later regulations than CAR-03: (CFR Part 23) 14 CFR Part 23.527(a)(2) amdt 23-45 14 CFR Part 23.529(a) amdt 23-45 14 CFR Part 23.1529 amdt 23-26 ------------------------------------------------------END-------------------------------------------------- 3 3 Add Page