# STC SA1649GL

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Airwolf Filter Corp
- Description: Installation of Sky-Tractor model 500 scavenge oil filter system with P&W model R-985 engines.
- Status date: May 1, 2018
- Data sheets: AR-33
- Certificate PDF: https://openairdocs.org/files/sha256/4b/ec/4bec920af6887255b818563571e2b0e18bd16e6412ed0a053454e407a9538e79
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0A737B57258689888625829F004B0873.0001
- Page: https://openairdocs.org/stc/SA1649GL

## ADs that name it

None.

## Approved models (1)

- de Havilland Inc. (Canada) L-20A (TCDS AR-33)

## 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.

8 Civil Air (See Type Certificate Data Sheet No. AR-33 for complete certification basis)

Installation of Sky-Tractor Model 500 Scavenge Oil Filter System in DeHavilland Model L-20A Aircraft with Pratt & Whitney Model R-985 Engines in accordance with Sky-Tractor Supply Company Drawing No. 500-G, no revision, dated October 18, 1990, and Model 500 Scavenge Oil Filter Installation Instructions, no revision, dated October 18, 1990, or later FAA approved revis ions of these documents.

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

2. A copy of this certificate shall be maintained as part of the permanent records for the modified aircraft. Maintain filter in accordance with Sky Tractor Supply Spin On Oil Filter Kit Maintenance Instructions, no revision, dated November 29, 1990, or later FAA approved revisions.

Airwolf Filter Corp.

12801 Hwy 75 North Okmulgee, OK 74447 AR-33 DeHavilland L-20A October 17, 1990

October 21, 1991

March 9, 2018; May 1, 2018

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

(Title)

## Every issue (2)

- May 1, 2018: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/4b/ec/4bec920af6887255b818563571e2b0e18bd16e6412ed0a053454e407a9538e79)
- March 9, 2018: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/f2/16/f2161ceba2a8420318b0ccd8346fab6f3c118a90012d3b0999cea4c2726a8396)

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From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.