# STC SR03408CH

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Airwolf Aerospace LLC, United States
- Description: Install Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-204-310-101-101 or AA-204-310-101-103
- Applied: July 18, 2012
- Status date: October 3, 2017
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS R00007DE](https://openairdocs.org/tcds/R00007DE), [TCDS H11SW](https://openairdocs.org/tcds/H11SW), [TCDS H1SW](https://openairdocs.org/tcds/H1SW), [TCDS H4SW](https://openairdocs.org/tcds/H4SW), [TCDS H4NM](https://openairdocs.org/tcds/H4NM), [TCDS H10NM](https://openairdocs.org/tcds/H10NM), [TCDS H2NM](https://openairdocs.org/tcds/H2NM), [TCDS H15NM](https://openairdocs.org/tcds/H15NM), [TCDS H5SO](https://openairdocs.org/tcds/H5SO), [TCDS R00004RC](https://openairdocs.org/tcds/R00004RC), [TCDS R00005SE](https://openairdocs.org/tcds/R00005SE), [TCDS H7SO](https://openairdocs.org/tcds/H7SO), [TCDS H3SO](https://openairdocs.org/tcds/H3SO), [TCDS R00008AT](https://openairdocs.org/tcds/R00008AT), [TCDS H5NM](https://openairdocs.org/tcds/H5NM), [TCDS H12NM](https://openairdocs.org/tcds/H12NM), [TCDS H13WE](https://openairdocs.org/tcds/H13WE), [TCDS H3NM](https://openairdocs.org/tcds/H3NM), [TCDS R00012AT](https://openairdocs.org/tcds/R00012AT), [TCDS H1RM](https://openairdocs.org/tcds/H1RM) and 5 more
- Certificate PDF: https://openairdocs.org/files/sha256/1b/1d/1b1d63ca6a14c95d853f30cf51c8b1938a5e8dd5a4bdeb336b4b843da657e377
- Approved model list and other attachments: [SR03408CH_AML.pdf](https://openairdocs.org/files/sha256/c3/d3/c3d36d3bd55a75367c54396d877f2994c716d867ade9f23d7b9c17755d67272e)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8A4EBD486444A99F862581BB00577C28.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR03408CH

## ADs that name it (1)

- [AD 2024-19-17](https://openairdocs.org/ad/2024-19-17): Rotorcraft flight control · Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N… (STC SR03408CH). Effective Oct 11, 2024. Named in the applicability

## Approved models (50)

- AST Inc. UH-1F ([TCDS H11SW](https://openairdocs.org/tcds/H11SW))
- Arrow Falcon Exporters Inc. UH-1H ([TCDS R00007DE](https://openairdocs.org/tcds/R00007DE))
- BLR Aerospace LLC 209/AH-1G ([TCDS H10NM](https://openairdocs.org/tcds/H10NM))
- Bell Helicopter Textron Inc. 204B ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))
- Bell Helicopter Textron Inc. 205A ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))
- Bell Helicopter Textron Inc. 205A-1 ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))
- Bell Helicopter Textron Inc. 205B ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))
- Bell Helicopter Textron Inc. 210 ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))
- Bell Helicopter Textron Inc. 212 ([TCDS H4SW](https://openairdocs.org/tcds/H4SW))
- Bell Helicopter Textron Inc. TH-1L ([TCDS H4NM](https://openairdocs.org/tcds/H4NM))
- Bell Helicopter Textron Inc. UH-1E ([TCDS H4NM](https://openairdocs.org/tcds/H4NM))
- Bell Helicopter Textron Inc. UH-1L ([TCDS H4NM](https://openairdocs.org/tcds/H4NM))
- California Department of Forestry UH-1F ([TCDS H2NM](https://openairdocs.org/tcds/H2NM))
- Hagglund Helicopters LLC UH-1H ([TCDS H15NM](https://openairdocs.org/tcds/H15NM))
- International Helicopters Inc. UH-1B ([TCDS H5SO](https://openairdocs.org/tcds/H5SO))
- JJASPP Engineering Services LLC UH-1H ([TCDS R00004RC](https://openairdocs.org/tcds/R00004RC))
- Northwest Rotorcraft LLC UH-1H ([TCDS R00005SE](https://openairdocs.org/tcds/R00005SE))
- OAS Parts LLC TH-1L ([TCDS H7SO](https://openairdocs.org/tcds/H7SO))
- OAS Parts LLC UH-1B ([TCDS H7SO](https://openairdocs.org/tcds/H7SO))
- OAS Parts LLC UH-1E ([TCDS H7SO](https://openairdocs.org/tcds/H7SO))
- OAS Parts LLC UH-1H ([TCDS H7SO](https://openairdocs.org/tcds/H7SO))
- OAS Parts LLC UH-1L ([TCDS H7SO](https://openairdocs.org/tcds/H7SO))
- Richards Heavylift Helo Inc. UH-1A ([TCDS H3SO](https://openairdocs.org/tcds/H3SO))
- Richards Heavylift Helo Inc. UH-1B ([TCDS H3SO](https://openairdocs.org/tcds/H3SO))
- Richards Heavylift Helo Inc. UH-1H ([TCDS H3SO](https://openairdocs.org/tcds/H3SO))
- Robinson Air Crane Inc. TH-1F ([TCDS R00008AT](https://openairdocs.org/tcds/R00008AT))
- Robinson Air Crane Inc. UH-1F ([TCDS R00008AT](https://openairdocs.org/tcds/R00008AT))
- Robinson Air Crane Inc. UH-1P ([TCDS R00008AT](https://openairdocs.org/tcds/R00008AT))
- Rotorcraft Development Corporation 209/AH-1G ([TCDS H10NM](https://openairdocs.org/tcds/H10NM))
- Rotorcraft Development Corporation HH-1K ([TCDS H5NM](https://openairdocs.org/tcds/H5NM))
- Rotorcraft Development Corporation TH-1F ([TCDS H12NM](https://openairdocs.org/tcds/H12NM))
- Rotorcraft Development Corporation TH-1L ([TCDS H5NM](https://openairdocs.org/tcds/H5NM))
- Rotorcraft Development Corporation UH-1B ([TCDS H13WE](https://openairdocs.org/tcds/H13WE))
- Rotorcraft Development Corporation UH-1B ([TCDS H3NM](https://openairdocs.org/tcds/H3NM))
- Rotorcraft Development Corporation UH-1E ([TCDS H5NM](https://openairdocs.org/tcds/H5NM))
- Rotorcraft Development Corporation UH-1F ([TCDS H12NM](https://openairdocs.org/tcds/H12NM))
- Rotorcraft Development Corporation UH-1H ([TCDS H13WE](https://openairdocs.org/tcds/H13WE))
- Rotorcraft Development Corporation UH-1L ([TCDS H5NM](https://openairdocs.org/tcds/H5NM))
- Rotorcraft Development Corporation UH-1P ([TCDS H12NM](https://openairdocs.org/tcds/H12NM))
- Rowland Aviation Services LLC UH-1B ([TCDS R00012AT](https://openairdocs.org/tcds/R00012AT))
- San Joaquin Helicopters UH-1B ([TCDS H1RM](https://openairdocs.org/tcds/H1RM))
- Smith Helicopters UH-1E ([TCDS H8NM](https://openairdocs.org/tcds/H8NM))
- Southern Helicopter Inc. UH-1B ([TCDS R00012AT](https://openairdocs.org/tcds/R00012AT))
- Southwest Florida Aviation International SW205A-1 ([TCDS H6SO](https://openairdocs.org/tcds/H6SO))
- Southwest Florida Aviation International UH-1B ([TCDS H6SO](https://openairdocs.org/tcds/H6SO))
- Southwest Florida Aviation International UH-1H ([TCDS H6SO](https://openairdocs.org/tcds/H6SO))
- Tamarack Helicopters Inc. TH-1F ([TCDS H7NE](https://openairdocs.org/tcds/H7NE))
- Tamarack Helicopters Inc. UH-1F ([TCDS H7NE](https://openairdocs.org/tcds/H7NE))
- US Helicopter Inc. AH-1S ([TCDS R00009AT](https://openairdocs.org/tcds/R00009AT))
- West Coast Fabrications UH-1E ([TCDS H9NM](https://openairdocs.org/tcds/H9NM))

## 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.

Part * of the * R egulations. *

Original Product --Type Certificate N umber : *

Install Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-204-310-101-101/101C or AA-204-310- 101-103/103C, in accordance with the Installation Instructions listed on the attached AMLSR03408CH reissued January 26, 2015, or later FAA-approved revision.

1. The installer must determine whether this design change is compatible with previously approved modifications.

2. A copy of this Certificate and FAA Approved Model List (AML) No. SR03408CH, re-issued October 3, 2017, or later FAA approved revision, must be maintained as part of the permanent records for the modified aircraft.

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

This certi ficate and the supporting data which is the basis for approval shall remain in effect until surrendered, suspended, revoked or a termination date is otherwise established by the A dministrator of the F ederal A viation A dministration.

Airwolf Aerospace, LLC 15369 Madison Road Middlefield, OH 44062

*See attached FAA Approved Model List (AML) No. SR03408CH for list of approved Bell Helicopter Textron Canada Limited models and applicable airworthiness regulations. M ake : * M odel : *

Date of application : July 18, 2012

Date of issuance : December 10, 2014

Date reissued : January 26, 2015, October 3, 2017

B y direction of the A dministrator

(Signature) Aaron Foutch Acting Manager, Airframe & Administrative Services Section Chicago ACO Branch

(Title)

### SR03408CH_AML.pdf

**FAA APPROVED MODEL LIST (AML) SR03408CH**

**AIRWOLF AEROSPACE LLC**

**FOR INSTALLING**

TENSION TORSION STRAP ASSEMBLY Issue Date: Dec.10, 2014 Page 1 of 4

**AIRCRAFT MAKE**

**AIRCRAFT MODEL**

**ORIGINAL TYPE**

**CERTIFICATE NUMBER**

**CERTIFICATION**

**BASIS FOR**

**ALTERATION**

**INSTALLATION**

**INSTRUCTIONS AML**

**AMENDMENT DATE ITEM NUMBER REVISION NO. AND DATE**

ARROW FALCON EXPORTERS INC. UH-1H R00007DE 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. R00007DE AA-204-ICA B * 1/21/17 10/3/17

2 AST INC. UH-1F H11SW 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H11SW AA-204-ICA B * 1/21/17 10/3/17 3 BELL HELICOPTER TEXTRON 204B, 205A-1, 205A, 205B H1SW 14 CFR PART 29 and Amendments Listed in TCDS No. H1SW AA-204-ICA B * 1/21/17 10/3/17 4 BELL HELICOPTER TEXTRON 212 H4SW 14 CFR PART 29 and Amendments Listed in TCDS No. H4SW AA-204-ICA B * 1/21/17 10/3/17 5 BELL HELICOPTER TEXTRON TH-1L, UH-1E, UH-1L H4NM 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H4NM AA-204-ICA B * 1/21/17 10/3/17 6 CALIFORNIA DEPT OF FORESTRY UH-1F H2NM 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H2NM AA-204-ICA B * 1/21/17 10/3/17

HAGGLUND HELICOPTERS LLC UH-1H H15NM 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H15NM AA-204-ICA B * 1/21/17 10/3/17

INTERNATIONAL HELICOPTERS UH-1B H5SO 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H5SO AA-204-ICA B * 1/21/17 10/3/17

NORTH WEST ROTORCRAFT LLC UH-1H R00005SE 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. R00005SE AA-204-ICA B * 1/21/17 10/3/17

**FAA APPROVED MODEL LIST (AML) SR03408CH**

**AIRWOLF AEROSPACE LLC**

**FOR INSTALLING**

TENSION TORSION STRAP ASSEMBLY Issue Date: Dec.10, 2014 Page 2 of 4

**AIRCRAFT MAKE**

**AIRCRAFT MODEL**

**ORIGINAL TYPE**

**CERTIFICATE NUMBER**

**CERTIFICATION**

**BASIS FOR**

**ALTERATION**

**INSTALLATION**

**INSTRUCTIONS AML**

**AMENDMENT DATE ITEM NUMBER REVISION NO. AND DATE**

**OVERSEAS**

**AIRCRAFT**

SUPPORT UH-1B, UH-1E, UH-1H, UH-1L, TH-1L H7SO 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H7SO AA-204-ICA B * 1/21/17 10/3/17

RICHARDS HEAVY LIFT UH-1A, UH-1B, UH-1H H3SO 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H3SO AA-204-ICA B * 1/21/17 10/3/17

ROBINSON AIR CRANE UH-1F, UH-1P, TH-1F R00008AT 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. R00008AT AA-204-ICA B * 1/21/17 10/3/17

ROTORCRAFT DEVELOPMENT 209/AH-1G H10NM 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H10NM AA-204-ICA B * 1/21/17 10/3/17

ROTORCRAFT DEVELOPMENT UH-1B H3NM 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H3NM AA-204-ICA B * 1/21/17 10/3/17 15 ROTORCRAFT DEVELOPMENT UH-1B, UH-1H H13WE 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H13WE AA-204-ICA B * 1/21/17 10/3/17

**ROTORCRAFT**

DEVELOPMENT UH-1E, UH-1L, TH-1L, HH-1K H5NM 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H5NM AA-204-ICA B * 1/21/17 10/3/17

ROTORCRAFT DEVELOPMENT UH-1F, UH-1P, TH-1F H12NM 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H12NM AA-204-ICA B * 1/21/17 10/3/17

**FAA APPROVED MODEL LIST (AML) SR03408CH**

**AIRWOLF AEROSPACE LLC**

**FOR INSTALLING**

TENSION TORSION STRAP ASSEMBLY Issue Date: Dec.10, 2014 Page 3 of 4

**AIRCRAFT MAKE**

**AIRCRAFT MODEL**

**ORIGINAL TYPE**

**CERTIFICATE NUMBER**

**CERTIFICATION**

**BASIS FOR**

**ALTERATION**

**INSTALLATION**

**INSTRUCTIONS AML**

**AMENDMENT DATE ITEM NUMBER REVISION NO. AND DATE**

18 SAN JOAQUIN UH-1B H1RM 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H1RM AA-204-ICA B * 1/21/17 10/3/17

19 SMITH HELICOPTERS UH-1E H8NM 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H8NM AA-204-ICA B * 1/21/17 10/3/17

SOUTHERN HELICOPTER INC. UH-1B R00012AT 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. R00012AT AA-204-ICA B * 1/21/17 10/3/17

**SOUTHWEST**

**FLORIDA**

AVIATION SW204 (UH-1B), SW204HP (UH-1B/HP) SW205 (UH-1H) SW205A-1 H6SO 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H6SO AA-204-ICA B * 1/21/17 10/3/17

22 TAMARACK UH-1F, TH-1F H7NE 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H7NE AA-204-ICA B * 1/21/17 10/3/17

US HELICOPTER INC. AH-1S R00009AT 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. R00009AT AA-204-ICA B * 1/21/17 10/3/17

WEST COAST FABRICATIONS UH-1E H9NM 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H9NM AA-204-ICA B * 1/21/17 10/3/17

25 TAMARACK UH-1H H7NE 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H7NE AA-204-ICA B * 1/21/17 10/3/17

**FAA APPROVED MODEL LIST (AML) SR03408CH**

**AIRWOLF AEROSPACE LLC**

**FOR INSTALLING**

TENSION TORSION STRAP ASSEMBLY Issue Date: Dec.10, 2014 Page 4 of 4

**AIRCRAFT MAKE**

**AIRCRAFT MODEL**

**ORIGINAL TYPE**

**CERTIFICATE NUMBER**

**CERTIFICATION**

**BASIS FOR**

**ALTERATION**

**INSTALLATION**

**INSTRUCTIONS AML**

**AMENDMENT DATE ITEM NUMBER REVISION NO. AND DATE**

BELL HELICOPTER TEXTRON 210 H1SW 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. H1SW AA-204-ICA B * 1/21/17 10/3/17

27 JJASSP ENGINEERING UH-111 R00004RC 14 CFR 21.25, 21.101 PART 29 and Amendments Listed in TCDS No. R00004RC AA-204-ICA B * 1/21/17 10/3/17 * Or Later FAA Approved Revisions

FAA Approved:

Aaron Foutch Acting Manager Airframe & Administrative Services Section Chicago ACO Branch

Date Amended: May 10, 2017

Date Reissued: January 26, 2015, October 3, 2017

## Every issue (5)

- October 3, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/1b/1d/1b1d63ca6a14c95d853f30cf51c8b1938a5e8dd5a4bdeb336b4b843da657e377), [SR03408CH_AML.pdf](https://openairdocs.org/files/sha256/c3/d3/c3d36d3bd55a75367c54396d877f2994c716d867ade9f23d7b9c17755d67272e)
- May 10, 2017: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/29/e6/29e63f9905e6a4a5e98564f4ce923f50e529a8b84e8a4d273734acddf72340d7), [SR03408CH_AML.pdf](https://openairdocs.org/files/sha256/8f/a9/8fa94965183456316ec74f4f9dc0380d63c779925f6e9c40cc6b076a91c878ac)
- April 28, 2016: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/29/e6/29e63f9905e6a4a5e98564f4ce923f50e529a8b84e8a4d273734acddf72340d7), [AML_SR03408CH.pdf](https://openairdocs.org/files/sha256/00/55/0055f0ec9a76e3a635f6c8980eca4afbfd23fd9b75c3fdf90aafff14930204bf)
- January 26, 2015: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/29/e6/29e63f9905e6a4a5e98564f4ce923f50e529a8b84e8a4d273734acddf72340d7), [SR03408CH_AML.pdf](https://openairdocs.org/files/sha256/43/32/43322b4f8571612020bf7201b7e31c6ccc87645a70b9d439b53e28dac9e1b37a)
- December 10, 2014: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/4c/16/4c16b071a93e1f2c2376f7364e70229c566d59cb1fd11abbde8844c311fb696f), [SR03408CH_AML.pdf](https://openairdocs.org/files/sha256/0e/95/0e95255f1646b7771eb674def825611de68b3202b57f334a8f63d8305098eecd)

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