# STC SR01845SE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Cascade Flying Service LLC, United States
- Description: Installation of a barrier air filtration system
- Applied: September 18, 2007
- Status date: March 23, 2018
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS 2H3](https://openairdocs.org/tcds/2H3), [TCDS 4H11](https://openairdocs.org/tcds/4H11)
- Certificate PDF: https://openairdocs.org/files/sha256/a8/d8/a8d8d783f7241fc3e0c4656195427fbc78a9cca1650d9692396d218979f14924
- Approved model list and other attachments: [SR01845SE_AML.pdf](https://openairdocs.org/files/sha256/a9/a3/a9a3ebd36c2685d4e69437382c235115b7d012bcd019c680d21d055f2fdee872)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2BEA77128786F91E86258260004CB415.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SR01845SE

## ADs that name it (0)

None.

## Approved models (13)

- Scotts-Bell 47 Inc 47G-2A ([TCDS 2H3](https://openairdocs.org/tcds/2H3))
- Scotts-Bell 47 Inc 47G-2A-1 ([TCDS 2H3](https://openairdocs.org/tcds/2H3))
- Scotts-Bell 47 Inc 47G-3 ([TCDS 2H3](https://openairdocs.org/tcds/2H3))
- Scotts-Bell 47 Inc 47G-3B ([TCDS 2H3](https://openairdocs.org/tcds/2H3))
- Scotts-Bell 47 Inc 47G-3B-1 ([TCDS 2H3](https://openairdocs.org/tcds/2H3))
- Scotts-Bell 47 Inc 47G-3B-2 ([TCDS 2H3](https://openairdocs.org/tcds/2H3))
- Scotts-Bell 47 Inc 47G-3B-2A ([TCDS 2H3](https://openairdocs.org/tcds/2H3))
- Scotts-Bell 47 Inc 47G-4 ([TCDS 2H3](https://openairdocs.org/tcds/2H3))
- Scotts-Bell 47 Inc 47G-4A ([TCDS 2H3](https://openairdocs.org/tcds/2H3))
- Scotts-Bell 47 Inc 47G-5 ([TCDS 2H3](https://openairdocs.org/tcds/2H3))
- Scotts-Bell 47 Inc 47G-5A ([TCDS 2H3](https://openairdocs.org/tcds/2H3))
- 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))

## 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.

Un ited S tates of Am erica Department of Transportation - Federal Aviation Administration Supplemental Type Certificate

Number SR01845SE

This certificate, issued to Cascade Aircraft Conversions, LLC 903 Grinnell Road Garfield, WA 99130

Part 6 of the Civil Aviation Regulations.

Original ProductType Certificate Number: See AML SR01845SE Make: See AML SR01845SE Model: See AML SR01845SE

Description of the Type Design Change: Installation of a barrier air filtration system in accordance with Cascade Aircraft Conversions Master Drawing List FW-CFS456-90, Rev A, dated April 8, 2008, or later FAA- approved revision.

Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only.

This approval should not be extended to other aircraft of these models on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other previously approved modifications, including changes in type design, w ill introduce no adverse effect upon the airworthiness of that aircraft.

This installation must be maintained in accordance with Cascade Aircraft Conversion document FW -CFS456-13, Revision IR, dated April 18, 2008, or later FAA approved revision.

If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

Date of application: September 18, 2007 Date reissued: March 23, 2018 Date of issuance: May 23, 2008 Date amended:

(Signature)

Manager, Seattle ACO Branch (Title)

### SR01845SE_AML.pdf

**FEDERAL AVIATION ADMINISTRATION (FAA) APPROVED MODEL LIST (AML) SR01845SE FOR**

INSTALLATION OF BARRIER FILTER SYSTEM ISSUE DATE: May 23, 2008

Page 1 of 2

**ITEM AIRCRAFT MAKE**

**AIRCRAFT MODEL**

**ORIGINAL TC NUMBER**

**CERTIFICATION**

**BASIS FOR**

**ALTERATION**

**FAA APPROVED**

**MASTER DRAWING LIST**

**INSTRUCTIONS FOR**

**CONTINUED**

**AIRWORTHINESS**

NOTES AML REV DATE Number Revision* Drawing Revision*

1. Bell 47G2A 2H3 CAR 6 FW-CFS456-90 Rev A, dated 4/8/08 FW-CFS-456-13 Rev IR, dated 4/18/08 Helicopter must have been modified STC SH657NW

2. Bell 47G2A-1 2H3 CAR 6 FW-CFS456-90 Rev A, dated 4/8/08 FW-CFS-456-13 Rev IR, dated 4/18/08 Helicopter must have been modified STC SH657NW

3. Bell 47G3 2H3 CAR 6 FW-CFS456-90 Rev A, dated 4/8/08 FW-CFS-456-13 Rev IR, dated 4/18/08 Helicopter must have been modified STC SH657NW

4. Bell 47G3B 2H3 CAR 6 FW-CFS456-90 Rev A, dated 4/8/08 FW-CFS-456-13 Rev IR, dated 4/18/08 Helicopter must have been modified STC SH657NW

5. Bell 47G3B-1 2H3 CAR 6 FW-CFS456-90 Rev A, dated 4/8/08 FW-CFS-456-13 Rev IR, dated 4/18/08 Helicopter must have been modified STC SH657NW

6. Bell 47G4 2H3 CAR 6 FW-CFS456-90 Rev A, dated 4/8/08 FW-CFS-456-13 Rev IR, dated 4/18/08 Helicopter must have been modified STC SH657NW

7. Bell 47G4A 2H3 CAR 6 FW-CFS456-90 Rev A, dated 4/8/08 FW-CFS-456-13 Rev IR, dated 4/18/08 Helicopter must have been modified STC SH657NW

8. Bell 47G5 2H3 CAR 6 FW-CFS456-90 Rev A, dated 4/8/08 FW-CFS-456-13 Rev IR, dated 4/18/08 Helicopter must have been modified STC SH657NW

9. Bell 47G3B-2 2H3 CAR 6 FW-CFS456-90 Rev A, dated 4/8/08 FW-CFS-456-13 Rev IR, dated 4/18/08 Helicopter must have been modified STC SH657NW

10. Bell 47G5A 2H3 CAR 6 FW-CFS456-90 Rev A, dated 4/8/08 FW-CFS-456-13 Rev IR, dated 4/18/08 Helicopter must have been modified STC SH657NW

11. Bell 47G3B-2A 2H3 CAR 6 FW-CFS456-90 Rev A, dated 4/8/08 FW-CFS-456-13 Rev IR, dated 4/18/08 Helicopter must have been modified STC SH657NW

12. Hiller UH-12D 4H10 CAR 6 FW-CFS456-90 Rev A, dated 4/8/08 FW-CFS-456-13 Rev IR, dated 4/18/08 Helicopter must have been modified STC SH177WE & SH559NW

**FEDERAL AVIATION ADMINISTRATION (FAA) APPROVED MODEL LIST (AML) SR01845SE FOR**

INSTALLATION OF BARRIER FILTER SYSTEM ISSUE DATE: May 23, 2008

Page 2 of 2

**ITEM AIRCRAFT MAKE**

**AIRCRAFT MODEL**

**ORIGINAL TC NUMBER**

**CERTIFICATION**

**BASIS FOR**

**ALTERATION**

**FAA APPROVED**

**MASTER DRAWING LIST**

**INSTRUCTIONS FOR**

**CONTINUED**

**AIRWORTHINESS**

NOTES AML REV DATE Number Revision* Drawing Revision*

13. Hiller UH-12E 4H11 CAR 6 FW-CFS456-90 Rev A, dated 4/8/08 FW-CFS-456-13 Rev IR, dated 4/18/08 Helicopter must have been modified STC SH178WE & SH560NW

14. Hiller UH-12E (4 Place) 4H11 CAR 6 FW-CFS456-90 Rev A, dated 4/8/08 FW-CFS-456-13 Rev IR, dated 4/18/08 Helicopter must have been modified STC SH178WE & SH560NW

* Or later FAA Approved Revision

FAA Approved:

Manager, Seattle ACO Branch AMENDED:

REISSUED: March 23, 2018

## Every issue (2)

- March 23, 2018: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/a8/d8/a8d8d783f7241fc3e0c4656195427fbc78a9cca1650d9692396d218979f14924), [SR01845SE_AML.pdf](https://openairdocs.org/files/sha256/a9/a3/a9a3ebd36c2685d4e69437382c235115b7d012bcd019c680d21d055f2fdee872)
- May 23, 2008: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/91/4d/914dd316a227120c935e75161cc62f78e3cf3a074d95f933436a6e035ff84db3), [SR01845SE AML.pdf](https://openairdocs.org/files/sha256/0e/74/0e74463dc366728c59ade8fbb2d523c78e05137d2925860f01cfb082fab7da72)

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