Artisan’s Lien. Air Ruidoso, Ltd., operated a commuter airline and air charter service between Ruidoso, New Mexico, and airports in Albuquerque and El Paso. Executive Aviation Center, Inc., provided services for airlines at the Albuquerque International Airport. When Air Ruidoso failed to pay more than $10,000 that it owed for fuel, oil, and oxygen, Executive Aviation took possession of Air Ruidoso’s plane. Executive Aviation claimed that it had a lien on the plane and filed a suit in a New Mexico state court to foreclose. Do supplies such as fuel, oil, and oxygen qualify as “materials” for the purpose of creating an artisan’s lien? Why or why not? (See page 543.)