EASA SIB SAFO10007: Tundra Tire Installation/Approval for Aeroplanes Equipped with Leaf Spring Type Main Landing Gear

What to do

Operators should inspect axle attachment areas for cracks, corrosion, and defects using dye penetrant or other FAA-accepted nondestructive testing methods. They must review manufacturer recommendations, consider material compatibility, and increase inspection frequency with detailed recordkeeping. Developing and following Instructions for Continued Airworthiness is essential, especially for aircraft modified before ICA or supplemental type certificate requirements. No explicit compliance deadline is stated.

Summary

The Safety Alert for Operators (SAFO) 10007 titled 'Tundra Tire Installation/Approval for Aeroplanes Equipped with Leaf Spring Type Main Landing Gear' provides safety information regarding the use of oversize tundra tires, skis, and wheel/ski configurations on aircraft with leaf spring type main landing gear. It highlights the increased risk of structural failures, particularly near the axle attachment holes, with at least 32 documented accidents primarily involving aircraft such as the Piper PA-18. The document offers guidance on inspection and maintenance practices to mitigate these risks.

What changed

SAFO 10007 introduces safety guidance and recommended actions for operators using or intending to install oversize tundra tires, skis, or wheel/ski modifications on aircraft with leaf spring main landing gear. It emphasizes the need for thorough inspections, including nondestructive testing methods, and the development of Instructions for Continued Airworthiness (ICA) to ensure ongoing safety. The alert also references Advisory Circular 23-17 for additional certification and safety information.

Why it matters

This SAFO is critical for aviation professionals because it addresses a significant safety concern involving structural failures that can lead to serious or fatal accidents. Operators, maintenance organizations, and compliance teams must understand the risks associated with tundra tire modifications and implement enhanced inspection and maintenance protocols. Proper adherence reduces the likelihood of landing gear failures and improves overall aircraft safety in harsh operating environments.