# STC SR02204LA - Type: Supplemental type certificate - Status: Current, Reissued - Holder: AKV Inc., United States - Description: Installation of an AKV, INC. N1/N2 Cycle Counter, PN UH1T53CC - Applied: March 10, 2008 - Status date: March 12, 2010 - Product: Aircraft, Rotorcraft - Certification basis: Part 21, Part 23, Part 25, Part 27, Part 29 - Data sheets: [TCDS H1SW](https://openairdocs.org/tcds/H1SW), [TCDS H7SO](https://openairdocs.org/tcds/H7SO) - Certificate PDF: https://openairdocs.org/files/sha256/6c/2d/6c2d0fa022847b1486941e56944fc46b09bdb897aa8574d8292970af7e293f8f - Approved model list and other attachments: [AMLSR02204LA.pdf](https://openairdocs.org/files/sha256/b9/c6/b9c6475f6b8e70a90ae4f30145a192307db97ecd410ffc1d6cb3d4339bbf3f65) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8A8563692087AD90862576E90046E298.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SR02204LA ## ADs that name it (0) None. ## Approved models (9) - Bell Helicopter Textron 204B ([TCDS H1SW](https://openairdocs.org/tcds/H1SW)) - Bell Helicopter Textron 205A ([TCDS H1SW](https://openairdocs.org/tcds/H1SW)) - Bell Helicopter Textron 205A-1 ([TCDS H1SW](https://openairdocs.org/tcds/H1SW)) - Bell Helicopter Textron 205B ([TCDS H1SW](https://openairdocs.org/tcds/H1SW)) - Bell Helicopter Textron 210 ([TCDS H1SW](https://openairdocs.org/tcds/H1SW)) - Overseas Aircraft Support Inc UH-1B ([TCDS H7SO](https://openairdocs.org/tcds/H7SO)) - Overseas Aircraft Support Inc UH-1E ([TCDS H7SO](https://openairdocs.org/tcds/H7SO)) - Overseas Aircraft Support Inc UH-1H ([TCDS H7SO](https://openairdocs.org/tcds/H7SO)) - Overseas Aircraft Support Inc UH-1L ([TCDS H7SO](https://openairdocs.org/tcds/H7SO)) ## What the certificate says This is OCR from the scanned FAA certificate. OCR can misread letters and numbers. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number SRO2204LA This certificate issued to: AKV, INC. 777 Aviation Road Camarillo, CA 93010 Part 29* of the Federal Aviation Regulalion. *certification basis is set forth in Type Certificate Date Sheet Original Product Type Certificate Number: **See attached FAA Approved Model List (AML) *No. SR02204LA (Report No. UH1-AML) for list of Make: *approved aircraft models and applicable Model: *airworthiness requirements Description of Type Design Change: Installation of an AKV, INC. N,/N2 Cycle Counter, PN UHIT53CC, in accordance with Master Drawing List (MDL) No. T53-001, Rev. NC, dated July 12, 2008, or later FAA approved revisions and FAA Approved Model List No. SR02204LA (Report No. UH1-AML, Rev. NC, dated June 5, 2008) or later FAA approved revisions. Limitations and Conditions: The NI/N Cycle Counter can only be installed on day/night VER aircraft with non-FADEC equipped engine. It is for ground crew to perform maintenance functions and not intended to replace the original indicator as certified with the aircraft. The approval of this change in type design applies to the aircraft models noted on the FAA Approved Model List only. Approval of this change in type design applies to the above model rotorcraft only. This approval should not be extended to rotorcraft of this model on which other alterations are incorporated unless it is determined that the relationship between this change and any of those other alterations will introduce no adverse effect upon the airworthiness of that rotorcraft. A copy of this STC must be included in the permanent records of the modified rotorcraft. 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. The FAA will reissue the certificate in the name of the transferee and forward it to him. TRANSFER ENDORSEMENT Transfer the ownership of the Supplemental Type Certificate Number to (Name of transferee) (Address of transfer) (Number and street) (City, State, and Zip code) from (Name of grantor) (Print or type)_ (Address of grantor) (Number and street) (City, State, and Zip code) Extent of Authority (if licensing agreement): Signature of grantor (In ink): ### AMLSR02204LA.pdf This is OCR from the scanned FAA attachment. OCR can misread letters and numbers. AKV inc. 5450 Tech Circle Moorpark, CA 93021-1792 Engineering Report UH1-AML Revision: NC **APPROVED MODEL LIST FOR N1 / N2 ENGINE CYCLE COUNTER** INSTALLATION IN THE BELL MODEL 204, 205, 210 AND UH-1 HELICOPTER POWERED WITH THE HONEYWELL T53 SERIES ENGINE PART NUMBER: UH1T53CC FAA STC NO.: SR02204LA CONFIDENTIAL AND PROPRIETARY Information in this document is confidential and proprietary to AKV Incorporated. This document is provided for the sole use of the recipient for the benefit of AKV. It may not be reproduced or disclosed to others, except as authorized in writing by an officer of AKV. Original Date: June 5, 2008 Revision Prepared By: Original Prepared By: Matt Giles Revision Approved By: Original Approved By: Jonathan Gunn Revision Approved By: : Project Engineer **AKV INC** ENGINEERING REPORT TITLE: AML for N1 / N2 CYCLE COUNTER - B204, 205, PAGE NO.: 1 210 AND UH-1 DATE: 6/05/08 REV.: NC REPORT NO.: UH1-AML **LIST OF EFFECTIVE PAGES** **ADDED PAGES ADDED PAGES** **PAGE REV PG REV PG REV PAGE REV PG REV PG REV** **AKV INC** ENGINEERING REPORT TITLE: AML for N1 / N2 CYCLE COUNTER - B204, 205, PAGE NO.: 2 210 AND UH-1 DATE: 6/05/08 REV.: NC REPORT NO.: UH1-AML **REVISION LOG** REVISION DATE PAGES AFFECTED REMARKS NC 6/05/08 All Pages Original **AKV INC** ENGINEERING REPORT TITLE: AML for N1 / N2 CYCLE COUNTER - B204, 205, PAGE NO.: 3 210 AND UH-1 DATE: 6/05/08 REV.: NC REPORT NO.: UH1-AMI **TABLE OF CONTENTS** **SECTION DESCRIPTION PAGE NO REVISION LOG 2 TABLE OF CONTENTS 3** **1.0 INTRODUCTION 4** **2.0 CERTIFICATION BASIS. 4** **3.0 APPROVED MODEL LIST...** **AKV INC** ENGINEERING REPORT TITLE: AML for N1 / N2 CYCLE COUNTER - B204, 205, PAGE NO.: 4 210 AND UH-1 DATE: 6/05/08 REV.: NC REPORT NO.: UH1-AML 1.0 INTRODUCTION This document is the FAA Approved Model List for STC No. TBD for installing the AKV Inc. N1 / N2 Cycle Counter into eligible aircraft. Revisions to the AML must be coordinated between the STC holder and the responsible ACO, and require FAA approval. This STC is only applicable to the 14 CFR, part 29 aircraft, as listed in this AML. Installations in 14 CFR, part 23, part 25, and part 27 aircraft are not authorized under this STC. This STC assumes the aircraft to be modified meets the type design as defined in the associated TCDS and the required type certificated equipment is installed. 2.0 Certification Basis The certification basis for each model qualified for this modification is detailed below. Aircraft Aircraft Type Data Sheet Certification Basis Make Model Bell 204 HISW 14 CFR 29 effective February 1, 1965 Helicopter plus Amendments 29-1 through 29-10, plus FAA Special Conditions No. 29- 29-EU-23, dated August 13, 1977. Bell 205 HISW 14 CFR 29 effective February 1, 1965 Helicopter plus Amendments 29-1 through 29-10, plus FAA Special Conditions No. 29- 29-EU-23, dated August 13, 1977. Bell 210 HISW 14 CFR 29 effective February 1, 1965 Helicopter plus Amendments 29-1 through 29-10, plus FAA Special Conditions No. 29- 29-EU-23, dated August 13, 1977. Bell UH-1 H7S0 14 CFR 29 effective February 1, 1965 Helicopter H13WE plus Amendments 29-1 through 29-10, H3SO plus FAA Special Conditions No. 29- H4NM 29-EU-23, dated August 13, 1977. R00005SE R00002RC H15NM R00007DE **AKV INC** ENGINEERING REPORT TITLE: AML for N1 / N2 CYCLE COUNTER - B204, 205, PAGE NO.: 5 210 AND UH-1 DATE: 6/05/08 REV.: NC REPORT NO.: UH1-AML 3.0 Approved Model List Issue Date: February 20, 2009 Aircraft Aircraft Type Required Approved Data and Added Model AML Make Model Certificate Specific Limitations Amendment Number Date Bell 204 HISW Master Document List: Helicopter AKV MDL T53-001 revision NC, dated 7/12/2008 approved under STC No. SRO2204LA Instructions for Continued Airworthiness: AKV ICAW T53-900, dated 7/12/2008 Bell 205 HISW Master Document List: Helicopter AKV MDL T53-001 revision NC, dated 7/12/2008 approved under STC No. SRO2204LA Instructions for Continued Airworthiness: AKV ICAW T53-900, dated 7/12/2008 Bell 210 HISW Master Document List: Helicopter AKV MDL T53-001 revision NC, dated 7/12/2008 approved under STC No. SRO2204LA Instructions for Continued Airworthiness: AKV ICAW T53-900, dated 7/12/2008 **AKV INC** ENGINEERING REPORT TITLE: AML for N1 / N2 CYCLE COUNTER - B204, 205, PAGE NO.: 210 AND UH-1 DATE: 6/05/08/ REV.: NC REPORT NO.: UH1-AML Bell UH-1 H7S0 Master Document List: Helicopter H13WE AKV MDL T53-001 revision NC, dated H3SO 7/12/2008 approved under STC No. H4NM SRO2204LA R00005SE R00002RC Instructions for Continued Airworthiness: H15NM AKV ICAW T53-900, dated 7/12/2008 R00007DE Thomas A. Enyart Dated: February 20, 2009 Manager, Propulsion Branch ## Every issue (2) - March 12, 2010: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/6c/2d/6c2d0fa022847b1486941e56944fc46b09bdb897aa8574d8292970af7e293f8f), [AMLSR02204LA.pdf](https://openairdocs.org/files/sha256/b9/c6/b9c6475f6b8e70a90ae4f30145a192307db97ecd410ffc1d6cb3d4339bbf3f65) - February 20, 2009: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/b9/c6/b9c6475f6b8e70a90ae4f30145a192307db97ecd410ffc1d6cb3d4339bbf3f65), [SR02204LA.pdf](https://openairdocs.org/files/sha256/8f/9e/8f9e4efd7cd81c07763588932924a5e9ece694af83b13a77abc4ef5015c74043) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.