STC SA02679SE

14 CFR 21.120)

FAA Form 8110-2 (10/24) SUPERSEDES PREVIOUS EDITION PAGE 1 OF 3

Number: SA02679SE This certificate issued to:

Increase in gross weight to 12,500 pounds in accordance with Master Drawing List VSI-90995, Revision C, dated 10/12/2019, or later FAA approved revision, and Airplane Flight Manual (AFM) LBL-1010-000, Revision A, dated 02/20/2020, or later FAA approved revision. For Certification Basis, see page 3.

1. You cannot use descriptive data about this design change to duplicate other products. This approval is limited to only the installation made in McKinnon G-21C Serial Number 1204. This STC does not permit manufacturing of parts for multiple installations.

2. Instructions for Continued Airworthiness (ICA) LBL-1009-000, Revision C, dated 8/23/2019, and LBL- 1008-000, Revision C, dated 8/23/2019, or later FAA approved revision must be made available to the operator at time of installation.

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

(See Continuation Page 3 for Certification Basis)

Snow Goose Aviation, LLC 8700 Sahalee Dr Anchorage, AK 99507 Original Product:

Type Certificate Number: 4A24

Make: McKinnon Model: G-21C

Date of application: March 10, 2019

Date of issuance: March 12, 2020 Date reissued: January 21, 2026

for Gregory S. DiLibero Title: Manager, West Certification Branch

23 of the Federal Aviation Regulations.

14 CFR 21.120)

FAA Form 8110-2 (10/24) SUPERSEDES PREVIOUS EDITION PAGE 2 OF 3

Number: SA02679SE Effective date: 01/21/2026

Transfer Endorsement Transfer the ownership of Supplemental Type Certificate Number: SA02679SE

14 CFR 21.120)

FAA Form 8110-2 (10/24) SUPERSEDES PREVIOUS EDITION PAGE 3 OF 3

Number: SA02679SE Effective date: 01/21/2026

(Continuation from page 1 for Certification Basis)

Certification Basis:

The type certification basis for the McKinnon G-21C is shown on TCDS 4A24 for parts not changed or not affected by this change.

The certification basis for parts changed or affected by the change since the referenced date of application as based upon 14 CFR Part 23, as amended by Amendment 23-1 through 23-61. Based on 21.101 and 21.115 and FAA policy for significant changes in FAA Order 8110.48, the certification basis for this modification was determined to be:

Regulations at an intermediate level:

23.303 (23-0), 23.305 (23-45), 23.307 (23-0), 23.603 (23-23), 23.609 (23-0), 23.613 (23-45), 23.1529 (23-26), 23.1557 (23-45), 23.1581 (23-50), 23.1583 (23-50), 23.1585 (23-50), 23.1589 (23-50).

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