Federal Register #2026-13979

FAA Airworthiness Directive: Inspections and Blade Replacement for CFM LEAP1A Engines and Bombardier Aircraft

This opportunity involves new airworthiness directives from the Federal Aviation Administration (FAA) targeting safety issues in commercial aircraft engines and components. - Government Buyer: - Federal Aviation Administration (FAA), Department of Transportation - Aircraft Certification Service, Continued Operational Safety Branch - OEMs and Vendors: - CFM International (primary OEM for LEAP1A engine components) - Airbus SAS (aircraft manufacturer, affected models) - Bombardier (aircraft manufacturer, affected BD700-2A12 model) - Products/Services Requested: - Borescope inspections and possible replacement of high-pressure turbine (HPT) rotor stage 1 blades on CFM LEAP1A engines - Part numbers: 2747M92P01, 2553M91G03, 2553M91G05, 2553M91G06, 2553M91G07, 2553M91G08 - General visual inspection of slat 2 cove rib 6 bracket fasteners on Bombardier BD700-2A12 aircraft - Unique/Notable Requirements: - Inspections are required at intervals of 150 or 300 flight cycles, depending on engine group - Focus on accelerated blade deterioration and airfoil distress, especially for engines operating in South Asia - Compliance with EASA AD 20250120 and CFM Service Bulletin LEAP1A7200048501A930AD, Issue 00400 - Inspection results must be reported to Airbus - The FAA considers the CFM AD an interim action pending a permanent solution

Description

The FAA is superseding AD 2025-21-03 for certain CFM Model LEAP engines. The new airworthiness directive requires initial and repetitive borescope inspections of the high-pressure turbine rotor stage 1 blades. Depending on inspection results, additional inspections or blade replacements may be required. This action addresses the unsafe condition of accelerated blade deterioration and airfoil distress in engines operating in the South Asia region. The directive is effective July 27, 2026, with comments accepted until August 24, 2026.

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