Federal Register #2026-16954

FAA Mandates Replacement of 3rd Stage HPC Rotor Blades for IAE AG Engines

The Federal Aviation Administration (FAA), under the Department of Transportation, is mandating the replacement of 3rd stage high-pressure compressor (HPC) rotor blades on specific International Aero Engines AG (IAE AG) engine models due to safety concerns. - Government Buyer: - Department of Transportation - Federal Aviation Administration (FAA) - Office: Aviation Safety - OEM Highlight: - International Aero Engines AG (IAE AG) is the original equipment manufacturer for both the engines and the affected rotor blades. - Products/Parts Requested: - Replacement of 3rd stage HPC rotor blades, part numbers 6A8353 and 6A8688 - Estimated 1,462 engines affected - Replacement can be with reworked or new blades; improved coating processes are required for eligible parts - Notable Requirements: - Replacement must occur at the next engine shop visit after the effective date, when the 3rd stage HPC rotor is exposed - Directive addresses risks of shroud wear, blade failure, engine fires, and in-flight shutdowns - Estimated cost per engine: $30,085 for reworked blades or $225,000 for new blades

Description

The FAA is adopting a new airworthiness directive (AD) for certain International Aero Engines AG (IAE AG) Model V2522-A5, V2524-A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, V2531-E5, and V2533-A5 engines. This AD was prompted by a manufacturer investigation that revealed that certain 3rd stage high pressure compressor (HPC) rotor blades were susceptible to shroud wear and blade failure. The AD requires replacement of affected 3rd stage HPC rotor blades with parts eligible for installation to address the unsafe condition. The directive is effective September 24, 2026.

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