Federal Register #2026-11218

FAA Proposed Airworthiness Directive for Airbus A330-841 and -941 Aircraft

The Federal Aviation Administration (FAA), under the Department of Transportation, is proposing a new Airworthiness Directive (AD) for all Airbus SAS Model A330-841 and -941 airplanes. - Government Buyer: - Federal Aviation Administration (FAA), Aircraft Certification Service - OEM Highlight: - Airbus SAS is the primary Original Equipment Manufacturer (OEM) affected by this directive - Products/Services Requested: - Compliance actions as specified in EASA AD 20250104R1, including: - Revisions to the Airplane Flight Manual (AFM) and Minimum Equipment List (MEL) - Seal integrity tests of the engine bleed air system (EBAS) high pressure valves (HPV) - Updates to the Bleed Monitoring Computer (BMC) software - Additional maintenance instructions and corrective actions - Limitations on installation of affected HPV clips - Prohibition of certain BMC software installations - Notable Requirements: - Removes the need for repetitive replacement of affected HPV clips - Adds new requirements for BMC software updates and MEL revisions - Focuses on addressing unsafe conditions related to EBAS HPV components and BMC software - Estimated 22 compliance actions required per EASA AD 20250104R1 - No specific part numbers or purchase quantities for hardware/software are provided; the focus is on compliance actions and software updates

Description

The FAA proposes to supersede Airworthiness Directive (AD) 2025-04-05, which applies to all Airbus SAS Model A330-841 and -941 airplanes. The current AD requires revisions to the airplane flight manual and minimum equipment list, seal integrity tests of engine bleed air system high pressure valves, maintenance instructions, corrective actions, and replacement of affected clips. The proposed AD continues these requirements except for repetitive replacement of affected clips and adds requirements to update the bleed monitoring computer software, perform additional work, and revise the minimum equipment list further. The AD aims to address unsafe conditions related to engine bleed air system components and software to ensure continued airworthiness and safety.

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