FAA 2023-26-05

Requires periodic replacement of titanium-threaded bolts at the forward end of the short rudder trim tab actuating rods, a one-time inspection of the rudder mass balance arm, and other elements of the rudder trim tab installation for correct attachment, damage (gouges), cracks, deformation, surface finish, and corrosion on any surrounding parts and, depending on findings, any necessary corrective actions. Prompted by a determination that these titanium-threaded bolts could be subject to unexpectedly high oscillating loads due to aerodynamic forces acting on the rudder trim tab.