# STC SA417NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Jobmaster Company Inc, United States
- Description: Installation of EDO Model Ya-6235 floats.
- Applied: February 10, 1977
- Status date: March 10, 1977
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-806](https://openairdocs.org/tcds/A-806)
- Certificate PDF: https://openairdocs.org/files/sha256/5b/73/5b7395b453732037c963a82e5de81442b4ebded53a69c21c84451a7111f373e7
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/098D8DF550402F7485256CC2000E3A24.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA417NW

## ADs that name it (0)

None.

## Approved models (1)

- Viking Air Limited DHC-2 Mk.I ([TCDS A-806](https://openairdocs.org/tcds/A-806))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America STC BOOk Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA417NW This certificate issued to: JOBMASTER COMPANY, INC.

Part 10 of the CiviI Air Regulationas Equivalent to CAR 3, Effective November 13, 1945.

Original Product - Typelertificate Number: 1-806 Make: DeHavilland Model: DHC-2 MK I Description of Type Design Change: Installation Of EDO Model · -6235 floats in accordance with Jobmaster Company Top Drawing J-77-3.

. NOTE: This modification requires the installation of the following ventral fins or auxilliary vertical stabilizer:

Ventral Fin (Standard) - DeHavilland Drawing No. C2VF2557A Ventral Fin (Large) - Jobmaster Company Drawing No. J74-18A Auxilliary Vertical Stabilizer Fin - Jobmaster Company Drawing No. J-76-118 Limitations and Conditions: Approval is limited to the installation in the DeHavilland Model DHC-2 Mk I only. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any other previously approved modification will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this Certificate and FAA Approved Jobmaster Flight Manual Supplement shall be maintained as part of the permanent records for the modified aircraft.

Date of Application: February 10, 1977 Date Reissued:

Date of Issuance: March 10, 1977 Date Amended:

FEDERAL AVIATION pale rente (Signature TO MINISTRATO Chief, Engineering and Manufacturing Branch (Title) or imprisonment not exceeding 3 years, or both

## Every issue (1)

- March 10, 1977: Issued, Current. [certificate](https://openairdocs.org/files/sha256/5b/73/5b7395b453732037c963a82e5de81442b4ebded53a69c21c84451a7111f373e7)

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