2025-09-09: Communications

1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. 2. The FAA amends § 39.13 by adding the following new airworthiness directive: 2025-09-09 MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.): Amendment 39-23030; Docket No. FAA-2025-0021; Project Identifier MCAI-2024-00612-T. (a) Effective Date This airworthiness directive (AD) is effective June 18, 2025. (b) Affected ADs None. (c) Applicability This AD applies to all MHI RJ Aviation ULC (Type Certificate previously held by Bombardier, Inc.) Model CL-600-2C10 (Regional Jet Series 700, 701 & 702), CL-600-2C11 (Regional Jet Series 550), CL-600-2D15 (Regional Jet Series 705), CL-600-2D24 (Regional Jet Series 900), and CL-600-2E25 (Regional Jet Series 1000) airplanes, certificated in any category. (d) Subject Air Transport Association (ATA) of America Code 23, Communications. (e) Unsafe Condition This AD was prompted by reports that a cockpit voice recorder (CVR) impact switch was installed in the wrong direction. The impact switch disables power to the CVR in the event of an accident to prevent overwriting cockpit recordings. The FAA is issuing this AD to address an incorrectly installed impact switch, which could result in loss of data that could hinder the identification of the unsafe condition in the event of an accident and consequently impede the development of actions to address the unsafe condition that caused the accident. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Requirements Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, Transport Canada AD CF- 2024-35, dated October 16, 2024 (Transport Canada AD CF-2024-35). (h) Exceptions to Transport Canada AD CF-2024-35 (1) Where Transport Canada AD CF-2024-35 refers to its effective date, this AD requires using the effective date of this AD. (2) Where paragraph A. of Transport Canada AD CF-2024-35 specifies to "inspect the installation of the impact switch P/N 3L0-453-2 in accordance with the MHIRJ AMM task 23-71-10-400-801 to confirm the reset switch faces forward," this AD requires replacing that text with "perform a general visual inspection of the installation of the impact switch P/N 3L0-453-2 to confirm the reset switch faces forward." (3) Where paragraph B. of Transport Canada AD CF-2024-35 specifies corrective action, this AD requires that the corrective action be performed before further flight after finding any impact switch that does not face forward. (i) Additional AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, International Validation Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the International Validation Branch, send it to the attention of the person identified in paragraph (j) of this AD and email to: [email protected] . Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office. (2) Contacting the Manufacturer: For any requirement in this AD to obtain instructions from a manufacturer, the instructions must be accomplished using a method approved by the Manager, International Validation Branch, FAA; or Transport Canada; or MHI RJ Aviation ULC's Transport Canada Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature. (j) Additional Information For more information about this AD, contact Steven Dzierzynski, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7300; email [email protected]. (k) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference of the material listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this material as applicable to do the actions required by this AD, unless this AD specifies otherwise. (i) Transport Canada AD CF-2024-35, dated October 16, 2024. (ii) [Reserved] (3) For Transport Canada material identified in this AD, contact Transport Canada, Transport Canada National Aircraft Certification, 159 Cleopatra Drive, Nepean, Ontario K1A 0N5, Canada; telephone 888-663-3639; email [email protected]; website tc.canada.ca/en/aviation. (4) You may view this material at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206-231-3195. (5) You may view this material at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations or email [email protected]. Issued on April 29, 2025. Steven W. Thompson, Acting Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2025-08339 Filed 5-13-25; 8:45 am]BILLING CODE 4910-13-P