The Alaska Gear Company 18TB4-1 square rudder assembly is designed for experimental PA-18-style aircraft and is manufactured with a 4130 chromoly steel rudder post, addressing the material-related safety concerns identified in FAA AD 2025-02-11.
AD 2025-02-11 identifies fatigue and corrosion issues associated with rudder posts made from 1025 carbon steel. This square-style rudder post is constructed from 4130 chromoly steel, providing improved fatigue resistance, corrosion durability, and long-term structural integrity compared to legacy materials.
The rudder assembly is supplied uncovered and powder-coated and includes pre-installed brass bushings to reduce installation time. This configuration includes a rear navigation light cup and does not include a strobe mounting location.

LP-051.080 UV-SG Aircraft Non-PMA part - left rear sliding window, LP Aero Plastics FAA-PMA Replacement 051 UV-SG
4140-00-15CJ New Fuel Pump (28 Volt) for Cessna Aircraft | C J Aviation | McFarlane Aviation 41400015CJ 