Potential Risk Management Issue after Engine Load Reduction Device Activation
Superseded. Comply with 2025-06R1, which replaces this document.
- Published
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators should identify which aircraft in their fleet are equipped with CFM LEAP engines featuring the LRD and ensure flight crews are informed about the potential for smoke events following LRD activation. Flight crew training programs should emphasize recognition of LRD activation consequences and the appropriate emergency procedures to isolate affected engines and mitigate smoke contamination. There are no mandatory compliance deadlines as this bulletin is informational, but proactive training and communication are recommended.
Summary
EASA Safety Information Bulletin 2025-06 is an informational document addressing a potential risk management issue related to the activation of the Load Reduction Device (LRD) on CFM International LEAP engines installed on Boeing 737 Max and Airbus A320 NEO family aeroplanes. The bulletin highlights incidents involving smoke contamination in the flight deck and cabin following LRD activation after engine bird strikes on Boeing 737 Max aircraft powered by CFM LEAP-1B engines. It provides details on the hazards, affected systems, and operational considerations for these aircraft types.
What changed
This new Safety Information Bulletin introduces awareness of the risks associated with LRD activation, including oil leakage into the Environmental Control System causing smoke or fumes in the cockpit and cabin. It summarizes two serious incidents on Boeing 737 Max aircraft and outlines the current interim safety measures and procedures pilots should follow to mitigate smoke contamination. The bulletin also describes differences in ECS architecture between Boeing 737 Max and Airbus A320 NEO family aircraft and the importance of crew training on these scenarios.
Why it matters
This bulletin is important for aviation professionals because it highlights a safety risk that can affect flight crew performance and passenger safety due to smoke or fumes in occupied compartments. Operators and maintenance organizations need to understand the implications of LRD activation and ensure flight crews are trained to respond promptly and correctly to engine damage events that may trigger smoke contamination. Awareness and proper procedural compliance can prevent escalation of in-flight emergencies and improve overall operational safety.
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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