# STC SA3684NM - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Kenmore Air Harbor LLC, United States - Description: Installation of Pratt & Whitney PT6A-135 engine and a Hartzell HC-B3TN-3DCY)/T10282+0 propeller. - Applied: December 23, 1986 - Status date: April 5, 2019 - 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/aa/fe/aafeabe59f49e10a90ce0950d2092c76a4725b0427e010b96998ab543277d540 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/96A5269FE0FF3B7E862585CE0055E756.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA3684NM ## ADs that name it (0) None. ## Approved models (1) - Viking Air Limited DHC-2 Mk.III ([TCDS A-806](https://openairdocs.org/tcds/A-806)) ## 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 SA3684NM This certificate, issued to Kenmore Air Harbor, LLC. 6321 NE 175th Street Kenmore, WA 98028 Part * of the Federal Aviation Regulations.* 21.29(a)(ii) Original ProductType Certificate Number: A-806 Make: DeHavilland Model: DHC-2 Mk III (Turbo-Beaver) Description of the Type Design Change: Installation of a Pratt & Whitney Model PT6A-135 or PT6A-135A engine, Hartzell HC-B3TN-3D(Y)/T10282-0 propeller, EPA fuel drain, extended exhaust nozzles, battery box, rudder springs and horizontal tail tip-fins, in accordance with Kenmore Air Harbor, Inc. Drawing list No. K17209, dated July 17, 1989, and Installation Instructions No. K17209, revised May 10, 1990, or later FAA -approved revisions. Limitations and Conditions: Approval of this change in type design applies to those DeHavilland Model DHC-2 Mk III airplanes equipped with Bristol 679-4930 floats or Bristol 348-1-4930 Amphibious floats only (PT6A-135); or Bristol 679-4930 floats only (PT6A-135A). 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 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 airplane. Airplanes modified in accordance with this STC must be operated in accordance with FAA approved Airplane Flight Manual Supplement Revised may 17, 1990, or later FAA-approved revision. A copy of this Certificate and the FAA-approved Flight Manual Supplement must be maintained as a part of the permanent records for the modified aircraft. NOTE: For maintenance limits, refer to the AFM Supplement. 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: December 23, 1986; Date reissued: April 5, 2019 May 30, 1989 Date of issuance: April 25, 1988 Date amended: May 17, 1990 FAA FORM 8110-2 (5/14) PAGE 1 OF 2 PAGES By direction of the Administrator (Signature) Acting Manager, Seattle ACO Branch (Title) Transfer the ownership of Supplemental Type Certificate Number to (Name of Transferee) (Address of Transferee) (Number and Street) (City, State, and ZIP Code) from (Name of Grantor) (Print or Type) (Address of Grantor) (Number and Street) (City, State, and ZIP Code) Signature of Grantor (In Ink): U.S. GPO: 1987-763-289 ## Every issue (2) - April 5, 2019: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/aa/fe/aafeabe59f49e10a90ce0950d2092c76a4725b0427e010b96998ab543277d540) - May 17, 1990: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/75/15/751568686d7775b9d67ed1f4b15d227b55b6d357b4b352eec52256c6a94432c0) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.