The 95539-000 is a Piper OEM airframe component identified as the lower fin hinge assembly, used in the vertical stabilizer (fin) structure of the aircraft. This hinge is part of the attachment system that connects the fin structure to adjacent structural elements and allows controlled mechanical load transfer between the vertical stabilizer and the fuselage assembly.

In typical Piper light aircraft designs, the fin hinge assemblies are not moving “door-style” hinges, but precision structural joints that ensure alignment, rigidity, and proper load distribution in the vertical stabilizer. The lower hinge (95539-000) works in conjunction with the upper hinge assembly and associated bearings to maintain fin positioning under aerodynamic loads during flight.

This component is installed in a high-stress aerodynamic area of the tail section, where it must withstand continuous vibration, yaw loads, and aerodynamic bending forces. It is typically paired with bushings or bearings to reduce wear at the pivot interface and maintain tight tolerances over the aircraft’s service life.

Materials are generally high-strength aluminum alloys or steel fittings depending on load path design, with corrosion protection applied due to exposure to environmental conditions at the empennage.

Because it is a primary structural attachment point for the vertical stabilizer, any wear, cracking, or elongation in the hinge assembly is considered critical and is addressed during scheduled inspections or structural checks.

Key features include:

Piper 95539-000 lower fin hinge assembly (empennage structural fitting)
Used in vertical stabilizer (fin) attachment system
Works with upper hinge and bearing components for alignment and load transfer
Installed in the tail section where aerodynamic loads are highest
Material: aircraft-grade aluminum or steel alloy (application dependent)
Designed for high fatigue and vibration resistance
Maintains fin alignment and structural rigidity
Typically incorporates bearing interfaces to reduce wear
Subject to strict inspection for cracks, corrosion, or deformation
Critical structural component in empennage assembly