Two units of the Lawrence-Allison Fire Protection District were dispatched Monday morning to a heavy equipment fire at the Mid-American Air Center northeast of Lawrenceville. Firefighters were called out around 8:20 a.m. to 13608 Hanger Lane at the airport where a 1996 Bob Cat Model 863 Skid Steer had caught fire. The blaze was caused by a fuel line problem and did an estimated $10,000 in damage. There were no reported injuries.