# STC SA4-1342

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Winslow Aerofilter Corp, United States
- Description: Installation of Winslow Aerofilter Corporation Model 30409A full flow lube oil filter with element 1A0235.
- Applied: June 16, 1960
- Status date: July 8, 1964
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A19](https://openairdocs.org/tcds/3A19)
- Certificate PDF: https://openairdocs.org/files/sha256/66/69/6669564dce64ba677ced106633d66312b82d51b544e18865fd8a03973b90be6c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/549F8F308526F77086257BEF0050AD2D.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-1342

## ADs that name it (0)

None.

## Approved models (1)

- The Cessna Aircraft Company 150 Series ([TCDS 3A19](https://openairdocs.org/tcds/3A19))

## What the certificate says

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

FEDERAL AVIATION AGENCY FORM APPROVED, BUDGET BUREAU NO. 04-R015 Supplemental Type Certificate

1. NAME AND ADDRESS OF APPLICANT Winslow Aerofilter Corporation 4069 Hollis Street oalland 8, Calic.

**INSTRUCTIONS - SUBMIT IN TRIPLICATE TO LOCAL FAA FLIGHT STANDARDS INSPECTOR.**

ISSUANCE COPY WILL BE RETURNED TO APPLICANT UPON Supplemental Type Certificate APPLIED FOR:

**AIRCRAFT ENGINE PROPELLER**

ORIGINAL MODEL DESIGNATION Cessna 150 Semi pea NEW MODEL DESIGNATION (If desired)

3. DESCRIPTION OF CHANGE filter with element f140235, per installation drawing #3-3A1901. Installation of Winslow Aerofilter Corporation Model 30409A full flow lube oil LIUTRARTON OF APPATCABELATE:

worthiness of that airplane. which other previoualy approved modifications are incorporated, unless it is de previously approved modifications vill introduce no adverse effect upon the air- termined that the interrelationship between this change and any of those other This approval should not be extended to other specific airplanes of this model on * Models to which this STO are applicable are reflected by sealed dravings. CERTIFICATION BASIS: Part 3

b. WILL PARTS BE MANUFACTURED FOR SALE (Ref. CAR 1.55)? VILL DATA BE AVAILABLE FOR SALE OR RELEASE TO OTHER PERSONS? YES YES NO • NO

5. SIGNATURE AND TITLE OF APPLICANT Amator A. Were June 16, 1960 SIGNATURE Date of Application: Winslow I. Moore, Prodict Engineer NATURE AND LOCATION OF DATA 6. To be Completed by FAA TITLE Engineering data are filed in FAA Aircraft Engineering Division, Wester Region, Los Angeles, California, and at the applicant's facility.

**ORIGINAL TYPE CERTIFICATE NO.**

FAA APPROVAL ЗА19 Bacca In Uppie: PENG OL SUPPLEMENTAL TYPE CERTIFICATE NO.

2242 574-1342 SIGNATURE DATE OF APPROVAL Charles R. Hawks, Chief Decembor 7, 1960 Aircraft Engineering Division Revised July 8, 1964 TITLE U.S. GOVERNMENT PRINTING OFFICE: 1959 0-509657 FORM FAA - 2417(5-59)

## Every issue (1)

- July 8, 1964: Issued, Current. [certificate](https://openairdocs.org/files/sha256/66/69/6669564dce64ba677ced106633d66312b82d51b544e18865fd8a03973b90be6c)

---
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.