Engine — High-Pressure Turbine — Rotor Interstage Seal — Replacement
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators and maintenance teams should review the replacement instructions and schedule the rotor interstage seal replacement as specified. Compliance with the replacement requirements should be integrated into maintenance planning to avoid operational disruptions. Any deadlines or intervals for replacement must be strictly observed to maintain airworthiness.
Summary
The document titled 'Engine — High-Pressure Turbine — Rotor Interstage Seal — Replacement' addresses maintenance requirements for the CFM INTERNATIONAL LEAP-1A and LEAP-1C engine models. It provides instructions related to the replacement of the rotor interstage seal in the high-pressure turbine section of these engines. This document is intended to ensure continued airworthiness and safe operation of aircraft powered by these engines.
What changed
This document introduces mandatory replacement procedures for the rotor interstage seal in the high-pressure turbine of CFM LEAP-1A and LEAP-1C engines. It specifies updated maintenance actions that must be followed to comply with the new safety requirements. The regulation establishes clear guidelines for the timing and method of seal replacement.
Why it matters
This regulation is critical for aviation professionals because it directly impacts engine reliability and safety. Operators and maintenance organizations must comply to prevent potential engine failures related to the rotor interstage seal. Ensuring adherence helps maintain regulatory compliance and reduces the risk of in-service engine issues.
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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New ADs and bulletins for CFM International LEAP-1A and International LEAP-1C, summarized like this page, every Monday.