Federal Register #FAA20268804

FAA Airworthiness Directives for Airbus A330/A340 and CFM International Engines

This opportunity involves proposed airworthiness directives from the Federal Aviation Administration (FAA) targeting safety improvements for Airbus SAS A330 and A340 airplanes, as well as certain CFM International engines. - Government Buyer: - Federal Aviation Administration (FAA), Department of Transportation - OEMs and Vendors: - Airbus SAS (aircraft manufacturer) - CFM International (engine manufacturer) - Products and Services Requested: - Modification of trimmable horizontal stabilizer actuator (THSA) installation for Airbus A330 and A340 - Implementation of electrical load sensing device (ELSD) wiring provisions - Installation and activation of ELSD with revised procedures - Additional actions for some aircraft: sealant application, connector modification, clamp tightening, structural modification around frame 87 - Initial and repetitive borescope inspections (BSIs) of rotating air high-pressure turbine (HPT) front seal for CFM International engines (CFM565B, CFM565C, CFM567B) - Removal and replacement of affected HPT inner stationary seals as needed - Quantities: - 120 U.S.-registered Airbus A330 and A340 airplanes affected - Unique or Notable Requirements: - Compliance with European Union Aviation Safety Agency (EASA) AD 2025-0169 - Incorporation of referenced materials for compliance - Ongoing and repetitive inspection requirements for affected engines - Addressing unsafe conditions that could result in loss of control or engine failure - Technical accessibility: - Modifications and inspections are aimed at preventing critical failures in flight control and engine operation - Work must be performed according to detailed procedures and standards referenced in the directive

Description

The FAA proposes to supersede Airworthiness Directive (AD) 2024-26-06, which applies to certain Airbus SAS Model A330 and A340 airplanes. The AD requires modifying the trimmable horizontal stabilizer actuator (THSA) installation, implementing electrical load sensing device (ELSD) wiring provisions, and installing and activating the ELSD with revised procedures. Additional actions are required for certain airplanes after the initial modification to address an unsafe condition that could result in loss of control of the airplane.

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