# STC SA642NW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Kenmore Air Harbor LLC, United States
- Description: Installation of EDO 628-2960 floats
- Applied: July 20, 1978
- Status date: April 5, 2019
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 5A6](https://openairdocs.org/tcds/5A6)
- Certificate PDF: https://openairdocs.org/files/sha256/5e/80/5e80aa7dd69c6c82c4b45a31753c47336c9d391d373203ccbc83e302da4697f6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/544B932B77A93793862585CE0054908F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA642NW

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 180C ([TCDS 5A6](https://openairdocs.org/tcds/5A6))

## 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 SA642NW

This certificate, issued to Kenmore Air Harbor, LLC.

6321 NE 175th Street Kenmore, WA 98028

Part 3 of the Civil Air Regulations,effective November 13, 1945.

Original ProductType Certificate Number: 5A6 Make: Cessna Model: 180C

Description of the Type Design Change: Installation of EDO 628-2960 floats in accordance with EDO Drawing 55770.

NOTE: This modification must install rudder return springs, Cessna Part Nos. 0173313 -1 and 0173313-2.

Limitations and Conditions: Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation in Cessna 180C, Serial Number 50837 only. A copy of this Certificate, and Addendum No. SA642NW shall be maintained as part of the permanent records for the modified aircraft.

Date of application: July 20, 1978 Date reissued: April 5, 2019 Date of issuance: July 28, 1978 Date amended:

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 SA642NW

Kenmore Air Harbor, LLC.

Issued: July 28, 1978 Reissued: April 5, 2019

**SUPPLEMENTAL TYPE CERTIFICATE ADDENDUM NO. SA642NW**

The conditions and limitations of the original specifications apply except as follows:

This Addendum, which is part of the Supplemental Type Certificate No. SA642NW, prescribes the conditions and limitations under which the STC was issued and meets the airworthiness requirements of Civil Air Regulations Part 3. A copy of this Addendum shall be maintained as part of the modified aircraft perm anent records.

SUPPLEMENTAL TYPE CERTIFICATE HOLDER: Kenmore Air Harbor, LLC.

**CESSNA 180C (SEAPLANE-NORMAL CATEGORY) AS MODIFIED BY STC SA642NW**

Serial Numbers Eligible: 50837 only

Airspeed Limits: Never exceed – 184 mph (160 knots) Maneuvering – 122 mph (106 knots) Max. structural cruising – 160 mph (139 knots) Flaps extended – 100 mph (87 knots)

Powerplant Instrument Markings: Same as specified

Maximum Weight: 2820 pounds

Center of Gravity Limits With Edo 628-2960 Floats: (+40.2) to (+43.9) at 2820 pounds (+35.0) to (+43.9) at 2125 pounds or less

Placards: A placard must be installed on the instrument panel in full view of the pilot as follows:

- END -

**FAA FORM 8110-2 (5/14) PAGE 3 OF 3 PAGES**

**GROSS WIGHT IS LIMITED TO 2820 LBS.**

WHEN EDO 628-2960 FLOATS ARE INSTALLED. PILOT IS RESPONSIBLE FOR PROPER LOADING. (SEE WEIGHT &

**BALANCE DATA)**

## Every issue (2)

- April 5, 2019: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/5e/80/5e80aa7dd69c6c82c4b45a31753c47336c9d391d373203ccbc83e302da4697f6)
- July 28, 1978: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/dc/4c/dc4c4298030ec20e8a86a45fec6dbf3ed004f777587ebfa11a926aace3fa9c72)

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