# STC SA4NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Markey, William C., United States
- Description: Installation of "Plane Booster" Wing Tips
- Applied: March 22, 1972
- Status date: August 17, 1972
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-759](https://openairdocs.org/tcds/A-759)
- Certificate PDF: https://openairdocs.org/files/sha256/f0/3a/f03a750bb82ce029a70656a790e4a3e711d3566318879761bf2032d5e86f3ca7
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EB8FA35FDC33979A86257AE1005B05F9.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4NW

## ADs that name it (0)

None.

## Approved models (1)

- American Champion Aircraft Corp. 7GCBC ([TCDS A-759](https://openairdocs.org/tcds/A-759))

## 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 SALW This certificate issued to: William C. Markey Purt LA of the Regulations.

Original Product - Type bertificate Number: TC759 Make: Champion Mirtel: 7GCBC Seaplane Serial No. 90 Description of Type Design Change: Installation of "Plane Booster" Wing Tips, P.N. 1589X.

Similatins and benditions: Data not suitable for reproduction in other aircraft;

Therefore, they are satisfactory for Champion 7GCBC Seaplane, Serial No. 90.

Date of Application: 22 March 1912 Date Reissued:

Date of Issuance: 17 August 1972 Date Amended:

FEDERAL ANTATION By Direction of the Administrator A Parter (Signature ) TOMINISTRATDO Chief Engineering and Manufacturing Branch (Itle) Northwest Region

## Every issue (1)

- August 17, 1972: Issued, Current. [certificate](https://openairdocs.org/files/sha256/f0/3a/f03a750bb82ce029a70656a790e4a3e711d3566318879761bf2032d5e86f3ca7)

---
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.