FAA Mandates Replacements for Faulty Jet Engine Parts
Published Date: 4/15/2025
Proposed Rule
Summary
The FAA is updating rules for certain CFM LEAP-1B jet engines to keep them safe. They’re asking owners to replace some engine parts made from questionable metal that might cause problems. This update adds more parts to the list and keeps the original replacement deadlines, so engine owners should act soon to avoid safety risks and costly repairs.
Analyzed Economic Effects
3 provisions identified: 1 benefits, 2 costs, 0 mixed.
Replacement Requirements Kept
If you own or operate aircraft with CFM LEAP-1B engines (models listed below), the FAA proposes to keep the existing requirement from AD 2023-23-12 to replace certain high-pressure turbine (HPT) rotor stage 1 disks and the compressor rotor stages 6-10 spool by the original replacement deadlines. The listed LEAP-1B models include LEAP-1B21, -1B23, -1B25, -1B27, -1B28, -1B28B1, -1B28B2, -1B28B2C, -1B28B3, -1B28BBJ1, and -1B28BBJ2.
More Parts Added to Coverage
The proposed AD expands applicability to include additional HPT rotor stage 1 disks that were manufactured from material suspected to have reduced material properties because of iron inclusion. That means more engines or parts are now covered by the replacement requirement.
Action to Address Unsafe Material
The FAA proposes this AD because the manufacturer identified parts made from material suspected to have reduced material properties due to iron inclusion. The AD is intended to address that unsafe condition on the affected LEAP-1B engines.
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Key Dates
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