All owners of Barons with extended fuel tip tanks should be aware that they can and do sometimes leak. This comes from the sealant cracking that secures the metal container and the interface to the main tank. When this happens the fuel will leak down the spar and show up along the under surface of the wing or on the landing gear wheel pant as did mine. Access is often difficult and may require an inspection plate to be created to give the maintenance staff the ability to properly apply the sealant to secure the fuel. Beware the thought of replacing this tip tank as that requires huge cost for labor besides the cost of the new tip from Beechcraft. Be sure to take your aircraft to a repair facility that is familiar with the Baron fuel system and the approved method of creating an inspection plate. Many of our Barons are older than 25 years and the opportunity for the sealant to start to crack is greater in the older aircraft.