FAA Expands Safety Checks on Lycoming Plane Engines
Published Date: 8/7/2025
Proposed Rule
Summary
If you own a plane with certain Lycoming engines, the FAA wants you to keep checking your engine oil and parts for wear to keep flying safe. They’re updating the rules to cover more engine parts and require some replacements to stop engine problems before they start. These changes mean more inspections and part swaps, so plan ahead to keep your engine happy and your wallet ready.
Analyzed Economic Effects
2 provisions identified: 0 benefits, 2 costs, 0 mixed.
Required oil and bushing inspections
The FAA proposes to require the repetitive oil inspections called for in AD 2024-21-02 to check for bronze metal particulates. If particulates are found, you must perform additional inspections of the connecting rod bushings for damage, fit, movement, and wear, and replace bushings if necessary; replacement of bushings with parts eligible for installation is a terminating action.
Expanded parts and date coverage
The proposed AD would expand the applicability of AD 2024-21-02 because the ship date range for potentially affected parts has been expanded and additional parts eligible for installation have been identified. That means more Lycoming engines (and more aircraft owners/operators) will be required to follow the inspections and replacement actions.
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