# STC SA572NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Clover Park Vocational/Technical Institute, United States
- Description: Installation of a Lycoming GO-480-C1D6 engine, Hartzell HC-83X20-2A/9333C-3 three bladed propeller, modified carburetor heat box, modified engine mount and cowling, oil radiator with flush type ram air inlet and external scoop, modified cowl flap, paper carburator air filter and duel battery system
- Applied: April 9, 1977
- Status date: March 22, 1978
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-782](https://openairdocs.org/tcds/A-782)
- Certificate PDF: https://openairdocs.org/files/sha256/15/21/1521d5220994a1e5208360b9ac913e88ff519473499471cc94f81f1e7b9436d9
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/38622D8C502BD30486257A450066C643.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA572NW

## ADs that name it (0)

None.

## Approved models (1)

- Sierra Hotel Aero Inc. Navion B ([TCDS A-782](https://openairdocs.org/tcds/A-782))

## What the certificate says

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

ST C United States of America Department of Transportation Federal Aviation Administration BooK Supplemental Type Certificate Number: SA572NW This cerlificule, issued le Clover Park Vocationa1 Technica1 School Certifies that the change in the type design for the fillowing freduct with the limitations and conditions therefor as specified heron meets the nirerothiness requirements / Purt 3 of the CIVI1 Air Regulalions:, dated November 13, 1945.

Original Product -TypebertificateNumber: A-782 Make: Navion Model: "B" Description of Type Design Change: Installation of a Lycoming 60-482-Creten heat box, Hartzell HC-83X20-2A/9333C-3 three bladed propeller, modified carburetor modified engine mount and cowling, oil radiator with flush type ram air inlet and external scoop, modified cowl flap, paper carburator air filter and duel battery system in accordance with Clover Park Installation Instructions No. CP1000 NOTE: This modification requires 30 lbs. of fixed ballest at station 177.5 (rear of baggage compartment).

Limitations and Conditions: Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation in a Navion, 'B" Serial Number NAC-4-2172-B, only. A copy of this Certificate and FAA approved airplane flight manual supplement shall be maintained as part of the permanent records for the modified aircraft.

## Every issue (1)

- March 22, 1978: Issued, Current. [certificate](https://openairdocs.org/files/sha256/15/21/1521d5220994a1e5208360b9ac913e88ff519473499471cc94f81f1e7b9436d9)

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