# STC SR00420NY

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Airwolf Filter, Corp, United States
- Description: Installation of Airwolf remote mounted engine oil filter Model AFC-600
- Applied: December 11, 1995
- Status date: December 20, 2017
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS 6H1](https://openairdocs.org/tcds/6H1), [TCDS 6H2](https://openairdocs.org/tcds/6H2), [TCDS 4H10](https://openairdocs.org/tcds/4H10), [TCDS 4H11](https://openairdocs.org/tcds/4H11), [TCDS H1WE](https://openairdocs.org/tcds/H1WE)
- Certificate PDF: https://openairdocs.org/files/sha256/71/a3/71a3a7988dffe8b8384359feaa5fccd2df424330a774cfe78a4150a4538d2e10
- Approved model list and other attachments: [SR00420NY_AML.pdf](https://openairdocs.org/files/sha256/9b/4d/9b4d791d14136816aaeb5e09647130bcfa66d4b181cc720ed3e819b018d0673b)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D6F9F1549698527C86258219004BB141.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR00420NY

## ADs that name it (0)

None.

## Approved models (9)

- Siam Hiller Holdings Inc. UH-12 ([TCDS 6H1](https://openairdocs.org/tcds/6H1))
- Siam Hiller Holdings Inc. UH-12A ([TCDS 6H1](https://openairdocs.org/tcds/6H1))
- Siam Hiller Holdings Inc. UH-12B ([TCDS 6H2](https://openairdocs.org/tcds/6H2))
- Siam Hiller Holdings Inc. UH-12C ([TCDS 6H2](https://openairdocs.org/tcds/6H2))
- Siam Hiller Holdings Inc. UH-12D ([TCDS 4H10](https://openairdocs.org/tcds/4H10))
- Siam Hiller Holdings Inc. UH-12E ([TCDS 4H11](https://openairdocs.org/tcds/4H11))
- Siam Hiller Holdings Inc. UH-12E-L ([TCDS 4H11](https://openairdocs.org/tcds/4H11))
- Siam Hiller Holdings Inc. UH-12L ([TCDS H1WE](https://openairdocs.org/tcds/H1WE))
- Siam Hiller Holdings Inc. UH-12L4 ([TCDS H1WE](https://openairdocs.org/tcds/H1WE))

## 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.

6 Civil Air

Installation of Airwolf remote mounted engine oil filter Model AFC-600, in accordance with Airwolf Oil Filter Kit AFC-K012 dated November 1, 1995 and Installation Instructions AFC-K012-A-II or AFC-K012-BII, dated November 1, 1995.

1. This installation applies to Hiller UH-12 Series helicopters equipped with a Lycoming or Franklin reciprocating engine as specified under the helicopter type certificates listed in the attached FAA Approved Model List.

2. Airwolf Maintenance Instructions AFC-K012-MI dated November 1, 1995 is required with this installation.

3. This approval should not be extended to helicopters of these models on which other previously approved modifications are incorporated, unless it is determined that the interrelationship between this change and any of those previously incorporated approved modifications will not introduce any adverse effect upon the airworthiness of the helicopter. A copy of this Certificate must be maintained as part of the permanent records for the modified helicopter.

Airwolf Filter, Corp.

12801 Hwy 75 North Okmulgee, OK 74447 * See attached FAA Approved Model List Hiller Aviation * See attached FAA Approved Model List December 11, 1995

April 12, 1996

December 20, 2017

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

(Title)

Original signed by:

Roy E. Boffo

### SR00420NY_AML.pdf

Approved Model List – STC SR00420NY For Installation of Airwolf Filter Corp. Remote Mount Engine Oil Filter

TC 6H1 TC 6H2 TC 4H10 TC 4H11 TC H1WE

UH-12 UH-12A UH-12B UH-12C UH-12D UH-12E UH-12-E-L UH-12L UH-12L4

Note: Corresponding Military Models listed in the respective FAA TC Data Sheet, are also eligible for this installation.

FAA Approved _______________________ Anthony Socias Manager, Airframe and Propulsion Branch

Date Issued: April 12, 1996

## Every issue (1)

- December 20, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/71/a3/71a3a7988dffe8b8384359feaa5fccd2df424330a774cfe78a4150a4538d2e10), [SR00420NY_AML.pdf](https://openairdocs.org/files/sha256/9b/4d/9b4d791d14136816aaeb5e09647130bcfa66d4b181cc720ed3e819b018d0673b)

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