Engine - High-Pressure Turbine Rotor Stage 2 Disk - Inspection / Replacement
- Published
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- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform an ultrasonic inspection of the HPT rotor stage 2 disk at the next piece-part exposure after October 21, 2020. If the inspection reveals any rejectable indications, the disk must be removed from service and replaced with an eligible part before further flight. Compliance with the AD is mandatory from the effective date of October 21, 2020.
Summary
The Federal Aviation Administration's Airworthiness Directive 2020-18-14 addresses all General Electric Company GE90-110B1 and GE90-115B turbofan engines equipped with a specific high-pressure turbine rotor stage 2 disk, part number 2505M73P03. This directive mandates ultrasonic inspection of the affected HPT rotor stage 2 disk to detect subsurface anomalies and requires replacement if defects are found. The directive aims to prevent potential engine failure and ensure continued airworthiness of affected engines.
What changed
This new airworthiness directive introduces a mandatory ultrasonic inspection requirement for the HPT rotor stage 2 disk on GE90-110B1 and GE90-115B engines. It also requires removal and replacement of the disk if any rejectable indications are detected during inspection. This AD is a new regulation responding to a manufacturer report of subsurface anomalies and does not amend or supersede any previous directives.
Why it matters
This AD is critical for aviation professionals as it addresses a potentially unsafe condition that could lead to uncontained engine failure, risking damage to the aircraft and safety of flight. Operators and maintenance organizations must ensure compliance to avoid in-service failures and maintain regulatory compliance. Early detection and replacement of defective parts help reduce unscheduled maintenance and enhance operational safety.
More for General Electric GE90
All 19- EASA AD US-2025-25-07Turbine Engine - High-Pressure Turbine (HPT) Stage 1 and HPT Stage 2 Disks - ReplacementJan 9, 2026
- EASA AD US-2025-07-10Engine Controls - Engine Indicating and Crew Alerting System - Dispatch Prohibition; Full Authority Digital Engine Control (FADEC) Integrated Circuit Microprocessor - Replacement; Electronic Engine Control FADEC - Software UpgradeMay 15, 2025
- EASA AD US-2024-06-15[Correction] Engine - Interstage High-Pressure Turbine Rotor Seal - InspectionsMay 14, 2024
- EASA AD US-2023-26-07
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