# STC SA246NW

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Renton Aviation Inc, United States
- Description: Installation of EDO Model 249A-2870 floats
- Applied: December 16, 1975
- Status date: June 15, 1976
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 5A6](https://openairdocs.org/tcds/5A6)
- Certificate PDF: https://openairdocs.org/files/sha256/43/5e/435eef70b2112160cdad316028f128ecb8b03627ada86a6d75d6c5d1bbae4048
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7FB26B1CAE5B5B0B86257ADA006D9A34.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA246NW

## ADs that name it (0)

None.

## Approved models (1)

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

## What the certificate says

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

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA2,656 This certificate issued to: Renton Aviation, InC.

Purt 3 of the CiviI Air Regulations, effective November 1, 1949.

Original Product -Type Certificate Numben: 5A6 Make: Cessna Model: 180J Description of Type Design Change: Installation of EDO Model 249A-2870 floats in accordance with EDO Drawing No. 13029.

Limitations and Conditions: Data pertaining to this modification are considered inadequate for duplication on other aircraft. This approval is limited to the installation on Cessna 180J Serial Numbers 18052628 and 18052551 only. A copy of this Certificate and Addendum Number SA246NW shall be maintained as part of the permanent records for the modified aircraft.

Date of Application: December 16, 1975 Date Reissued:

Date of Issuance: December 31, 1975 Date Amended: June 15, 1976 FEDERAL AVIATION partel deborales fion of the Slalminisfrat OHINISTRALOA Chief, Engineering and Manufacturing Branch (I itle)

47.

• (Continuation Sheet) Number: SA2,655W Supplemental Type Certificate ADDENDUM NO. SA246NW The conditions and limitations of the original specifications apply except as follows:

This Addendum, which is part of Supplemental Type Certificate No. SA246NW, prescribes 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 permanent records.

Supplemental Type Certificate HOLDER: Renton Aviation, Inc.

CESSNA 180J (SEAPLANE-NORMAL CATEGORY) AS MODIFIED BY STC SA246NW Serial Numbers Eligible: Serial Numbers 18052628 and 18052551 only.

Air Speed Limits: Never exceed - 192 mph (167 knots) Maneuvering - 120 mph (11l knots) Max. Structural Cruising - 160 mph (139 knots) Flaps extended - 110 mph (96 knots) Powerplant Instrument Same as specified Markings:

Maximum Weight:

Center of Gravity Limits:

with EDO 249A-2870 Floats:

2950 Pounds (+30.0) to (+43.9) at 2950 Pounds to (+43.9) at 2400 Pounds or less

- END

**FAA FORM 8110-2-1 (10-69) PAGE 3 OF 3 PAGES C FAA AC 73-2651**

## Every issue (1)

- June 15, 1976: Amended, Current. [certificate](https://openairdocs.org/files/sha256/43/5e/435eef70b2112160cdad316028f128ecb8b03627ada86a6d75d6c5d1bbae4048)

---
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.