The 67189-00 is a Piper OEM spring part number that has been superseded or cross-referenced to 487-487, commonly identified in aftermarket and parts catalogs as a landing gear downlock spring used in Piper fixed-wing aircraft landing gear systems.

This type of spring is part of the mechanical linkage that assists or maintains the nose gear down-and-locked position. In aircraft landing gear systems, downlock springs are used to apply force that helps ensure the gear remains securely locked when extended, preventing unintended retraction or partial lock conditions during landing or ground operations.

The 67189-00 / 487-487 spring is typically installed within the nose gear or retract mechanism assembly depending on aircraft model (commonly seen in PA-28/PA-32 family variations with retract or specific landing gear configurations). It is a consumable mechanical component subject to fatigue over time due to repeated compression cycles and vibration loads during landing, taxi, and gear operation.

Constructed from high-carbon spring steel or corrosion-resistant alloy steel, this component is designed to maintain consistent elastic performance over many cycles while operating in an aviation environment exposed to vibration, temperature variation, and mechanical stress.

Proper maintenance requires inspection for elongation, deformation, corrosion, or loss of tension. Replacement is typically done during landing gear servicing or whenever gear actuation issues or improper locking behavior is detected.

Key features include:

Piper 67189-00 spring (superseded / alternative to 487-487)
Landing gear downlock / nose gear retention spring
Used in nose gear and retractable landing gear mechanisms
Provides mechanical force to assist gear lock engagement
Material: high-strength spring steel or corrosion-resistant alloy
Designed for repeated compression cycles in vibration-heavy environments
Critical for ensuring positive gear-down lock condition
Installed within landing gear linkage or actuator assemblies
Subject to fatigue inspection and periodic replacement
Common in Piper PA-series landing gear systems (model-dependent configuration)