Special Conditions: CFM International, LEAP-1B engine model; Incorporation of Woven Composite Fan Blades
Summary
The FAA is allowing CFM International to use new woven composite (plastic-based) materials for fan blades in LEAP-1B aircraft engines, which are commonly used on modern commercial airplanes. This change permits lighter, more efficient engines while maintaining safety standards, potentially reducing fuel costs and emissions for airlines and passengers.
Key Points
- 1Permits CFM International to manufacture fan blades using woven composite materials instead of traditional metals for LEAP-1B engines
- 2Lighter composite blades can improve fuel efficiency and reduce operating costs for airlines
- 3The FAA is requiring special safety testing and monitoring to ensure composite blades perform as reliably as metal ones
- 4These engines are used on Boeing 737 MAX and Airbus A320neo aircraft, affecting millions of passengers globally
- 5Public comment period runs until September 19, 2025, allowing stakeholders to raise concerns about the new material approval
Key Dates
August 4, 2025
This summary is for informational purposes only. It may not capture all nuances of the regulation. Always refer to the official text for authoritative information.
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