Engine — High Pressure Turbine — Rotor Interstage Seal — Replacement
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must replace affected High Pressure Turbine Rotor Interstage Seals during the next qualified shop visit or before exceeding specified cycle thresholds, whichever occurs first. They must also avoid installing any affected parts on engines from the effective date of 7 February 2024. Compliance should follow the instructions in CFM Service Bulletin LEAP-1A-72-00-0492-01A-930A-D.
Summary
EASA Airworthiness Directive 2024-0026 is an airworthiness directive addressing the replacement of the High Pressure Turbine Rotor Interstage Seal on CFM International LEAP-1A engines installed on certain Airbus A319, A320, and A321 aircraft. The directive targets specific affected parts identified by part number 2466M68P02 and certain serial numbers. It mandates replacement of these parts to ensure continued safe operation of the engines.
What changed
This new airworthiness directive introduces mandatory replacement of affected High Pressure Turbine Rotor Interstage Seals due to detected sub-surface anomalies that could reduce material strength. It prohibits the installation of these affected parts on any engine after the effective date. The directive also defines compliance thresholds based on engine model and cycles since new.
Why it matters
This directive is critical for aviation professionals because the affected turbine seals may fail due to material defects, potentially causing high-energy debris release and damage to the aircraft. Operators and maintenance organizations must ensure timely replacement to maintain airworthiness and comply with regulatory requirements. Failure to comply could lead to unsafe flight conditions and regulatory penalties.
More for CFM International LEAP-1A
All 21- EASA SIB 2025-06R1Potential Risk Management Issue after Engine Load Reduction Device ActivationOct 1, 2026
- EASA AD 2025-0171R2Engine – High Pressure Turbine Rotor Stage 1 Blade – InspectionJul 3, 2026
- EASA PAD 26-006Engine — Full Authority Digital Electronic Control Software — ReplacementJan 16, 2026
- EASA AD 2025-0246Engine — Non-Synchronous Vibration During Engine Operation — Monitoring / ReplacementOct 30, 2025
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