# STC SA55CH

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Airwolf Filter Corp, United States
- Description: Installation of Model 600 scavenge oil filter system.
- Applied: June 2, 1992
- Status date: May 1, 2018
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A10WE](https://openairdocs.org/tcds/A10WE)
- Certificate PDF: https://openairdocs.org/files/sha256/cd/37/cd3796f87e9e47e9dfb9e7eb59733bd0f7e55f3821294dd66d084b147dac567d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2B98778191E8A3768625829F004B0885.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA55CH

## ADs that name it (0)

None.

## Approved models (2)

- Weatherly Aviation Company Inc. 201B ([TCDS A10WE](https://openairdocs.org/tcds/A10WE))
- Weatherly Aviation Company Inc. 201C ([TCDS A10WE](https://openairdocs.org/tcds/A10WE))

## 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.

21 Federal Aviation (See Type Certificate Data Sheet No. A10WE for complete certification basis)

Installation of Sky-Tractor Model 600 Scavenge Oil Filter System in Weatherly Aircraft Company model 201B and 201C Aircraft with Pratt & Whitney Model R-985 Engines in accordance with Sky-Tractor Supply Company Drawing List Report No. 600, revision 1, dated March 16, 1993, and Model 600 Scavenge Oil Filter Installation Instructions, revision 1, dated March 16, 19 93, or later FAA approved revisions 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 airc raft 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 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 March 16, 1993, or later FAA approved revisions.

Airwolf Filter Corp.

12801 Hwy 75 North.

Okmulgee, OK 74447 A10WE Weatherly Aviation Company, Inc.

201B, 201C June 2, 1992

May 3, 1993

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/cd/37/cd3796f87e9e47e9dfb9e7eb59733bd0f7e55f3821294dd66d084b147dac567d)
- March 9, 2018: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/e7/38/e7389a0276127a78521d5d3adca415de939c11832a296a0a56d3ca01e487fdd2)

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