# STC SA398NW - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Kenmore Air Harbor Inc, United States - Description: Installation of Hartzell HC-B3R30-4/ R10152-5 1/2 propeller, governor, and spinner (optional) on Pratt & Whitney R-985 series engines - Applied: December 27, 1976 - 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/sha256/92/6a/926a331d4eafc4e2c46c8a919641737c6609577246207de12001243db6d43698 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/39A96833E04BE74F862585CE0046EAC9.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA398NW ## 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 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 SA398NW This certificate, issued to Kenmore Air Harbor, LLC. 6321 NE 175th Street Kenmore, WA 98028 Part 10 of the Federal Aviation Regulations. Original ProductType Certificate Number: A-806 Make: Viking Air Limited Model: DHC-2 Mk I Description of the Type Design Change: Installation of Hartzell HCB3R30-4/R10152-5 ½ propeller, governor, and spinner (optional) on Pratt and Whitney R-985 series engines in accordance with Kenmore Air Harbor, Inc. Installation Instructions No. K8785, Revision A, dated July 29, 2014, or later FAA approved revision. Note: No changes are deemed necessary to Viking Air Limited Flight Manual PSM 1-2-1 as a result of this change. Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only. This approval should not be extended to other aircraft of this model series unless the installer determines that the relationship between this change and any other previously incorporated approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this certificate 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: December 27, 1976 Date reissued: April 5, 2019 Date of issuance: January 24, 1977 Date amended: 2/14/80; 8/31/92; 11/24/14 FAA FORM 8110-2 (5/14) PAGE 1 OF 3 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 Number SA398NW Kenmore Air Harbor, LLC. Issued: January 24, 1977 Reissued: April 5, 2019 Amended: 2/14/80; 8/31/92; 11/24/14 This approval is also extended to installation on those DHC-2 Mk I airplanes equipped with EDO model 679-4930 seaplane floats installed in accordance with either STC SA182WE or SA1913WE. A copy of this Certificate and addendum No. SA398NW shall be maintained as part of the permanent records for the modified aircraft. **SUPPLEMENTAL TYPE CERTIFICATE ADDENDUM NO. SA398NW** The conditions and limitations of the original specifications apply except as follows: This Addendum which is part of Supplemental Type Certificate No. SA398NW, prescribes conditions and limitations under which the STC was issued and meets the airworthiness requirements of Civil Air Regulations Part 10 (CAR 3). A copy of this Addendum shall be maintained as part of the modified aircraft permanent records. SUPPLEMENTAL TYPE CERTIFICATE HOLDER: Kenmore Air Harbor, LLC. DEHAVILLAND DHC-2 Mk I (L-20A) BEAVER (NORMAL CATEGORY) AS MODIFIED BY STC SA398NW Engine: Pratt and Whitney R-985, SB-3 (See Aircraft Specification No. A-806, Item 301, for optional engines.) Fuel: 80/87 octane minimum grade aviation gasoline. Engine Limits: No change from Airplane Flight Manual. Propeller and Propellor Limits: Hartzell 3 Blade: Hub Model: HC-B3R30-4 Blade Model: R10152-5 ½ Pitch Settings at 30” sta.: 38.1 degree High: 15 degree Low Governor: Hartzell C-4 Spinner: Hartzell 836-32(R, PR, SR, or SPR), 104368, 104368(P) NOTE: Spinner installation is optional, however, the rear hub portion of the spinner bulkhead must be installed with or without rear plate. Dome mounting skirt must be removed if dome is not installed. - END - **FAA FORM 8110-2 (5/14) PAGE 3 OF 3 PAGES** ## Every issue (3) - April 5, 2019: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/92/6a/926a331d4eafc4e2c46c8a919641737c6609577246207de12001243db6d43698) - November 24, 2014: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/e2/38/e23833acfb6529c7d91b0ded5fe3dc0643300752fac4dd749bb3c313aff4c23f) - August 31, 1992: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/8c/1d/8c1df15e9b0eee4fb02cd6bb290d33e0cd89997dc3c4e413fc82a8a6a0c1590c) --- 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.