# STC SA74NW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Tundrahawk LLC, United States
- Description: Installation of Edo 248-2440 floats.
- Applied: June 13, 1973
- Status date: June 9, 2015
- Product: Aircraft, Single-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS A-767](https://openairdocs.org/tcds/A-767)
- Certificate PDF: https://openairdocs.org/files/sha256/75/36/7536dc2bea64c3ff4951920812fbdb223cae9be20cf508f930880efa43906018
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1A1727654FACB4D986257E60007BCE3A.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA74NW

## ADs that name it (0)

None.

## Approved models (2)

- Univair Aircraft Corporation 108-2 ([TCDS A-767](https://openairdocs.org/tcds/A-767))
- Univair Aircraft Corporation 108-3 ([TCDS A-767](https://openairdocs.org/tcds/A-767))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

Number SA74NW

This certificate, issued to Tundrahawk, LLC 2425 Merrill Field Drive Anchorage, AK 99501

Part 3 of the Civil Air Regulations.

Original ProductType Certificate Number: A-767 Make: Univair Model: 108-2 and 108-3 (Seaplane)

Description of the Type Design Change: Installation of Edo 248-2440 floats in accordance with PDX Aircraft Corporation Drawing Numbers 108-203 and 108-204, dated September 9, 1973, or later Federal Aviation Administration (FAA) approved revision.

NOTE: The FAA-approved airplane flight manual supplement (AFMS) dated July 10, 1980, or later FAA-approved revision supporting Supplemental Type Certificate (STC) SA1199WE for the Stinson 108-2 and 108-3 aircraft is required.

Limitations and Conditions: Approval of this change in type design applies to the above model aircraft Serial Numbers 208-2250 and up with the Continental Series engines installed as described on STC SA1199WE only.

This approval should not be extended to other aircraft of these models on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this certificate and the AFMS must be maintained as part of the permanent records for the modified aircraft.

If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

Date of application: June 13, 1973 Date reissued: 7/10/80; 3/23/94; 8/1/01; 6/9/15 Date of issuance: October 12, 1973 Date amended: 11/2/73; 12/19/88; 3/23/94; 8/1/01

(Signature)

Manager, Seattle Aircraft Certification Office (Title)

## Every issue (2)

- June 9, 2015: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/75/36/7536dc2bea64c3ff4951920812fbdb223cae9be20cf508f930880efa43906018)
- August 1, 2001: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/16/ce/16ce02c6d1ef399f84d82a5dd460480432232894c6a8a237925835d8ab1df4e4)

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From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.