The 1241099 is a Pipistrel internal part number referring to a nose wheel axle nut used in the aircraft’s nose landing gear assembly. This component is part of the wheel retention system and is responsible for securing the nose wheel axle in the fork, ensuring proper alignment, free rotation, and safe load transfer during ground operations such as taxiing, takeoff, and landing.

In light aircraft like Pipistrel models, the nose wheel axle nut is typically used together with an axle bolt, washers, spacers, and sometimes a self-locking feature (e.g., nyloc or all-metal locknut) depending on the design revision. The correct torque setting is critical: it must be tight enough to prevent axial play but loose enough to allow the wheel to rotate freely without binding.

Maintenance documentation for similar Pipistrel landing gear systems indicates that the axle nut is checked during pre-flight inspection for security and proper tightening, as loosening could lead to wheel misalignment or loss of the wheel assembly under load.

In aviation landing gear systems, this type of nut is considered a critical fastener due to its role in maintaining wheel integrity and ensuring safe ground handling. It is typically manufactured from high-strength steel with corrosion protection (zinc-plated or cadmium-free coatings depending on certification requirements).

Key features include:

Pipistrel 1241099 nose wheel axle nut (landing gear fastener)
Secures nose wheel axle within fork assembly
Works in combination with axle bolt, spacers, and washers
Often self-locking or safety-wired depending on configuration
Material: high-strength steel with corrosion-resistant coating
Critical for safe wheel retention and alignment
Must be torqued to manufacturer specification (preload control required)
Allows free wheel rotation without axial play when correctly adjusted
Inspected regularly during pre-flight and maintenance checks
Used in tricycle landing gear nose wheel assemblies