Engine - High-Pressure Turbine (HPT) Stage 1 and HPT Stage 2 Disks - Replacement
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected GE GEnx engines must inspect installed HPT stage 1 and stage 2 disks against the specified part and serial numbers in the referenced service bulletins. Replacement of affected disks must occur by July 8, 2025, or at the next piece-part exposure, whichever comes first. Removed affected parts must not be reinstalled, and only parts eligible for installation should be used going forward.
Summary
The Federal Aviation Administration's Airworthiness Directive 2025-11-03 addresses certain General Electric Company GEnx engine models, including GEnx-1B64, GEnx-1B67, GEnx-1B70 series, and GEnx-2B67/P. This directive mandates the replacement of specific high-pressure turbine (HPT) stage 1 and stage 2 disks that were manufactured with powder metal material suspected to contain iron inclusions. The AD aims to prevent potential premature fractures and uncontained failures in these engine components.
What changed
This new airworthiness directive introduces a mandatory replacement requirement for affected HPT stage 1 and stage 2 disks identified by specific part and serial numbers. It clarifies that removed affected parts are not eligible for reinstallation and sets compliance deadlines based on cycles or next piece-part exposure. The AD incorporates service bulletins GE GEnx-1B SB 72-0542 R00 and GE GEnx-2B SB 72-0471 R00 as reference materials.
Why it matters
This AD is critical for aviation professionals because it addresses a manufacturing defect that could compromise engine safety and reliability. Operators and maintenance organizations must ensure timely replacement of affected turbine disks to avoid uncontained engine failures, which can have severe safety and operational consequences. Compliance with this directive helps maintain airworthiness and reduces the risk of in-flight engine incidents.
More for General Electric GEnx
All 24- EASA AD US-2026-14-03Engine - Engine Fuel Distribution - ReplacementAug 10, 2026
- EASA AD US-2026-04-09Turbine Engine - High-Pressure Compressor Stage 5 Blisks - ReplacementMar 5, 2026
- EASA AD US-2024-25-07Engine - Stages 6-10 Compressor Rotor Spools - InspectionJan 14, 2025
- EASA AD US-2023-17-08Engine - Stages 6—10 Compressor Rotor Spools and Forward Seals - ReplacementSep 19, 2023
- EASA AD US-2022-25-20
Get the next one by email
New ADs and bulletins for General Electric GEnx, summarized like this page, every Monday.