Engine - High-Pressure Turbine Stage 1 and 2 Disks, Forward Rotor and Interstage Seals and Stages 7—9 Compressor Rotor Spools - Replacement
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of aircraft equipped with GE90-90B, GE90-94B, GE90-110B1, and GE90-115B engines must replace the specified high-pressure turbine disks, forward and interstage seals, and compressor rotor spools with parts eligible for installation. Compliance with the replacement requirement is mandatory by February 27, 2024, the effective date of the directive. Stakeholders should consult the referenced GE service bulletins for detailed replacement instructions and verify affected serial and part numbers.
Summary
The Federal Aviation Administration's Airworthiness Directive 2023-26-07 mandates replacement of certain high-pressure turbine stage 1 and 2 disks, forward rotor seals, interstage seals, and stages 7-9 compressor rotor spools on General Electric Company GE90-90B, GE90-94B, GE90-110B1, and GE90-115B engines. This directive addresses parts manufactured with powder metal material suspected to contain iron inclusions that could lead to premature failure. The directive aims to ensure continued airworthiness and safety of affected engines.
What changed
This new airworthiness directive introduces mandatory replacement of affected turbine disks, rotor seals, and compressor rotor spools identified as containing iron inclusions due to manufacturing defects. It updates affected part numbers and clarifies affected components referencing additional GE service bulletins. The directive also confirms that affected operators have been previously notified and requires compliance before further flight.
Why it matters
This directive is critical for aviation professionals because it addresses a potential safety risk of uncontained engine failure caused by material defects in key engine components. Operators and maintenance organizations must ensure timely replacement to prevent in-flight engine damage and maintain regulatory compliance. It also impacts maintenance planning and parts inventory management for affected GE90 engine models.
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- EASA AD US-2024-06-15[Correction] Engine - Interstage High-Pressure Turbine Rotor Seal - InspectionsMay 14, 2024
- EASA AD US-2023-05-17Engine - High Pressure Turbine Stage 2 Nozzles and Blades / Exhaust Centerbody - Inspection / Replacement
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