# STC SA4440NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Airwolf Filter Corporation, United States
- Description: Installation of an air/oil separator.
- Applied: June 16, 1980
- Status date: December 20, 2017
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A13](https://openairdocs.org/tcds/3A13)
- Certificate PDF: https://openairdocs.org/files/sha256/8d/7e/8d7e4257eac961b966da2d025a95b6e300f1f5b096a108afafc389c03233433e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/442B0664D6A136EC8625821800565D25.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4440NM

## ADs that name it (0)

None.

## Approved models (2)

- The Cessna Aircraft Company R182 ([TCDS 3A13](https://openairdocs.org/tcds/3A13))
- The Cessna Aircraft Company TR182 ([TCDS 3A13](https://openairdocs.org/tcds/3A13))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

3* Civil Air

*Certification basis is set forth on Type Certificate Data Sheet 3A13, Revision 39.

Installation of an air/oil separator in accordance with FAA-sealed Walker Engineering Company Master Drawing List No.

DLW-3009, Revision “NC”, dated June 12, 1980 or later FAA-approved revisions.

The approval of this change in type design applies basically to the above listed models only. This approval should not be extended to other specific airplanes of these models on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of the above listed airplanes.

Airwolf Filter, Corp.

12801 Hwy 75 North Okmulgee, OK 74447 3A13 Cessna R182, TR182 June 16, 1980

June 23, 1982

November 27, 2001; December 20, 2017

(Signature) Roy E. Boffo Manager, Propulsion and Project Management Section Chicago ACO Branch

(Title)

Original signed by:

Roy E. Boffo

## Every issue (1)

- December 20, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/8d/7e/8d7e4257eac961b966da2d025a95b6e300f1f5b096a108afafc389c03233433e)

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