# STC SR09921AC - Type: Supplemental type certificate - Status: Current, Issued - Holder: Liberty Partners, United States - Description: Demonstration of aircraft critical equipment and antenna systems tolerance of radio frequency interference (RFI) from intentional or spurious transmissions from certain Portable Electronic Devices PEDs) - Applied: June 26, 2020 - Status date: March 15, 2021 - Product: Aircraft, Rotorcraft - Certification basis: Part 21, Part 27 - Data sheets: [TCDS H9EU](https://openairdocs.org/tcds/H9EU), [TCDS H2SW](https://openairdocs.org/tcds/H2SW) - Certificate PDF: https://openairdocs.org/files/sha256/b2/b0/b2b0f87dc5ffa8571d99d3e06ef436f2884bdeeecab05f9e83c6234c9f14fbf2 - Approved model list and other attachments: [AML_SR09921AC.pdf](https://openairdocs.org/files/sha256/bf/e3/bfe330422e405977ad4342b582658aca8519b4b21fc3a7d88f8037d77025b27e) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F5E5768B7CD7C1E8862586B50058551A.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SR09921AC ## ADs that name it (0) None. ## Approved models (6) - Airbus Helicopters AS-350B ([TCDS H9EU](https://openairdocs.org/tcds/H9EU)) - Airbus Helicopters AS-350B1 ([TCDS H9EU](https://openairdocs.org/tcds/H9EU)) - Airbus Helicopters AS-350B2 ([TCDS H9EU](https://openairdocs.org/tcds/H9EU)) - Airbus Helicopters AS-350B3 ([TCDS H9EU](https://openairdocs.org/tcds/H9EU)) - Airbus Helicopters AS-350BA ([TCDS H9EU](https://openairdocs.org/tcds/H9EU)) - Bell Textron Canada Limited 407 ([TCDS H2SW](https://openairdocs.org/tcds/H2SW)) ## 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. FAA Form 8110-2 (11/20) SUPERSEDES PREVIOUS EDITION Page 1 of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: Part 27 of the Federal Aviation Regulations. Model List Report LP2923-AML0001 for approved models See Approved Title: The installer must determine whether this design change is compatible with previously approved modifications. 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. (Continued on Page 3 of 3) Jim Grigg Manager, Fort Worth ACO Branch Compliance and Airworthiness Division Aircraft Certification Service 3 March 15, 2021 June 26, 2020 Demonstration of aircraft critical equipment and antenna systems tolerance of radio frequency interference (RFI) from intentional or spurious transmissions from certain Portable Electronic Devices (PEDs) in accordance with master data list LP2923-DL001, revision IR, dated January 15, 2021, or later approved FAA revision. Liberty Partners 812 West 9th St. Okmulgee, OK 74447 SR09921AC FAA Form 8110-2 (11/20) SUPERSEDES PREVIOUS EDITION Page 2 of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: 3 SR09921AC FAA Form 8110-2 (11/20) SUPERSEDES PREVIOUS EDITION Page ___ of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: Description of Type Design Change (continued): Certification Basis: This STC does not constitute installation approval of a wireless radio frequency system using wireless data technologies. It only provides data that may partially support its installation or its activation. One of the following Rotorcraft Flight Manual Supplements (RFMS) is required as defined in the master data list. LP2923-FM001 Revision IR, dated February 1, 2021, or later FAA approved revision LP2923-FM002 Revision IR, dated February 1, 2021, or later FAA approved revision LP2923-FM003 Revision IR, dated February 1, 2021, or later FAA approved revision LP2923-FM011 Revision IR, dated February 1, 2021, or later FAA approved revision LP2923-FM012 Revision IR, dated February 2, 2021, or later FAA approved revision LP2923-FM013 Revision IR, dated February 1, 2021, or later FAA approved revision Refer to the attached Approved Model List. -------------------------------------------------------------END------------------------------------------------ SR09921AC ### AML_SR09921AC.pdf APPROVED MODEL LIST ©Copyright LIBERTY PARTNERS, INC. (2013-2020). This document is not releasable under the Freedom of Information Act. CONFIDENTIAL Proprietary Data. LIBERTY PARTNERS, INC. reserves all proprietary rights in the confidential data furnished herein. Use of this document is restricted to conveyance of information on a need-toknow basis to customers or vendors of LIBERTY PARTNERS, INC. This information shall not be released, disclosed, used or duplicated for procurement or manufacturing purposes or any other reason without the written permission of LIBERTY PARTNERS, INC. By accepting receipt and possession of this document, you acknowledge and agree to these regulations. Report: LP2923-AML0001 Rev: A APPROVED MODEL LIST Demonstration of Rotorcraft Tolerance of Radio Frequency Interference from Certain Transmitting Portable Electronic Devices FAA STC Number ___________ FAA Approved: Manager, Fort Worth ACO Branch Federal Aviation Administration Fort Worth, TX 76177 SR09921AC **APPROVED MODEL LIST** Page 2 of 4 ©Copyright LIBERTY PARTNERS, INC. (2013-2020). LIBERTY PARTNERS, INC. Copyrighted and CONFIDENTIAL Proprietary Information--Use or disclosure of this data subject to restrictive legend on title page. Report: LP2923-AML0001 Rev: A **AML REVISION LOG** Revision Level Pages/ Sections Affected Description of Changes FAA Approval Approved Date IR All Initial Release A All Added AS350B model and variants. APPROVED MODEL LIST Page 3 of 4 ©Copyright LIBERTY PARTNERS, INC. (2013-2020). LIBERTY PARTNERS, INC. Copyrighted and CONFIDENTIAL Proprietary Information--Use or disclosure of this data subject to restrictive legend on title page. Report: LP2923-AML0001 Rev: A 1. INTRODUCTION This document is the FAA Approved Model List for STC Number __________ for the Demonstration of Rotorcraft Tolerance to Radio Frequency Interference from Certain Portable Electronic Devices (PED) in eligible rotorcraft. Revision to this AML requires FAA approval. 2. STC CONFIGURATION Beginning with Rev IR of this specification, AML STC __________ shall be applied to a rotorcraft selectively based on the type of testing/evaluation performed and the type(s) of PED’s covered. Each combination of testing type and PED’s covered is identified by an STC Configuration, as follows: Typical STC Configuration X## In this example “X” stands for: Type(s) of testing/evaluation performed In this example “##” stands for: Type(s) of PED’s covered STC Configurations are fully defined in the STC MDL. Each AML STC Configuration requires that a specific Rotorcraft Flight Manual Supplement (RFMS) be applied. Table 2.a: AML STC Configuration Options and their corresponding RFMS STC Configuration (Corresponding AFMS) Phases of Flight Non-Critical Phases only (A)(2) All Phases of Flight (B) PED(1) Combination 01 WiFi & Bluetooth A01 (LP2923-FM001) B01 (LP2923-FM011) 02 WiFi, Bluetooth, & Cellular A02 (LP2923-FM002) B02 (LP2923-FM012) 03 WiFi, Bluetooth, Cellular, plus customer specified PED’s A03 (LP2923-FM003) B03 (LP2923-FM013) (1) As defined in STC MDL. (2) Critical Phases of Flight – Rotorcraft: Critical phases of flight include taxiing, hovering, takeoff, final approach, missed approach, the landing and any other phases of flight as determined by the pilot-in-command or commander. SR09921AC SR09921AC APPROVED MODEL LIST Page 4 of 4 ©Copyright LIBERTY PARTNERS, INC. (2013-2020). LIBERTY PARTNERS, INC. Copyrighted and CONFIDENTIAL Proprietary Information--Use or disclosure of this data subject to restrictive legend on title page. Report: LP2923-AML0001 Rev: Ap01 3. APPROVED MODEL LIST Rotorcraft Make Rotorcraft Model(s) TCDS No./Cert Basis(1) Additional Approved Data(2) Remarks Amendment Date Bell Textron Canada Limited 407 TCDS H2SW Rev 51 BH4466-EL001, Approved Equipment List BH4466-EL002, Approved Equipment List AFMS defined by Table 2.a. None Original Issue Airbus Helicopters AS350B, AS350B1, AS350B2, AS350BA, AS350B3 TCDS H9EU Rev 23 AS4759-EL001, Approved Equipment List AS4759-EL002, Approved Equipment List AFMS defined by Table 2.a. None Revision A End of List (1) Specific regulations met for all models are the latest amendments at the time of the STC Issue, 14 CFR 27.1309(a)(b)(c) Amdt. 27-46, 14 CFR 27.865(b)(3)(ii)(A)(B) Amdt. 27-36, 14 CFR 27.1501(a)(b) Amdt. 27-14, 14 CFR 27.1529 Amdt. 27-18, 14 CFR 27.1581(a)(2) Amdt. 27-14, and 14 CFR 27.1583(e) Amdt. 27-16. (2) The Instructions for Continued Airworthiness LP2923-CA001 is included for all models listed. ## Every issue (1) - March 15, 2021: Issued, Current. [certificate](https://openairdocs.org/files/sha256/b2/b0/b2b0f87dc5ffa8571d99d3e06ef436f2884bdeeecab05f9e83c6234c9f14fbf2), [AML_SR09921AC.pdf](https://openairdocs.org/files/sha256/bf/e3/bfe330422e405977ad4342b582658aca8519b4b21fc3a7d88f8037d77025b27e) --- 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.