More Woven Blade Safety Specs for CFM's LEAP-1B Engine Model
Published Date: 8/4/2025
Rule
Summary
CFM International’s LEAP-1B engines now use cool woven composite fan blades, which are new and different. Since current safety rules don’t fully cover this design, the FAA updated special safety standards to keep everyone safe. This change affects engine makers and airlines, ensuring these blades meet top safety levels without extra costs or delays.
Analyzed Economic Effects
1 provisions identified: 1 benefits, 0 costs, 0 mixed.
New Safety Rules for Woven Fan Blades
The FAA amended Special Condition No. 33-017-SC for CFM International’s LEAP-1B engines because they now incorporate woven composite fan blades. The amendment adds special safety standards so these new blades meet a level of safety equivalent to existing airworthiness rules, and it applies to engine makers and airlines.
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