# STC SA1221NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Cook. William H.  Jr., United States
- Description: Installation of a Champion oil filter assembly
- Applied: April 21, 1981
- Status date: April 30, 1981
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-734](https://openairdocs.org/tcds/A-734)
- Certificate PDF: https://openairdocs.org/files/sha256/91/06/9106ac2c085df2611e7c2341cf92d05a3c1c21c95dc6fc6564cd58ccf2b36436
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1D36F0473996FA7386257A3A0069827C.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1221NW

## ADs that name it (0)

None.

## Approved models (1)

- Gulfstream American Corporation G-44 ([TCDS A-734](https://openairdocs.org/tcds/A-734))

## 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 SAI22IN4 This certificate issued to: Wil| i am H. COOk Part 4a of the CiVil Air Regulations:

Original Product - TypeCertificate Number: A-734 Make: Gulfstream American (Grumman) Model: G-44 Description of Type Design Change: Installation of a Champion CH48108 oil Filter assembly and associated systems on Ranger 6-440-C5 engines In accordance with William H. Cook photographs 1 through 13.

inadequate for duplication in other aircraft. This approval is limited to the this Certificate shall be maintained as part of the permanent records for the modified aircraft.

Date of Application: April 21, 1981 Date Reissued:

Date of Issuance: April 30, 1981 Date Amended:

FEDERAL AVIATION By Direction of the Administrator Camell Mederson (Signature ) TOMINISTRATOE Acting Chief, Seattle Area Aircraft Certification Office ( Iitle)

47.

FAA FoR B110-2 (10-68)

## Every issue (1)

- April 30, 1981: Issued, Current. [certificate](https://openairdocs.org/files/sha256/91/06/9106ac2c085df2611e7c2341cf92d05a3c1c21c95dc6fc6564cd58ccf2b36436)

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