Jet Stabilizer Scare: FAA Demands Gear Swap
Published Date: 4/15/2025
Proposed Rule
Summary
If you fly or fix MHI RJ Aviation ULC regional jets, listen up! The FAA wants you to check and possibly replace a worn gear part in the plane’s stabilizer to keep flights safe. This fix needs to happen soon and could cost some money, but it’s all about keeping the skies safe and smooth.
Analyzed Economic Effects
2 provisions identified: 0 benefits, 2 costs, 0 mixed.
Mandatory stabilizer gear inspections
If you operate or maintain MHI RJ Aviation ULC regional jets (Models CL-600-2C10 Series 700/701/702; CL-600-2C11 Series 550; CL-600-2D15 Series 705; CL-600-2D24 Series 900; CL-600-2E25 Series 1000), the FAA proposes you must inspect the horizontal stabilizer trim actuator (HSTA) to check rubber bull gear (RBG) wheel part numbers. The proposed airworthiness directive requires those inspections to identify affected parts before further flight or maintenance actions.
Replace worn stabilizer gear; installation ban
If inspections find prematurely worn teeth on the rubber bull gear (RBG) wheel in the HSTA, you must perform on-condition replacement of the affected RBG wheels. The proposal also prohibits installing affected parts under certain conditions as specified in the Transport Canada AD that the FAA proposes to incorporate by reference.
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