What was found
SMOKE IN UPPER CARGO COMPARTMENT AND COCKPIT. INSPECTED AND FOUND APU GENERATOR CONTROL PANEL AND APU VOLTAGE REGULATOR BURNED. INSPECTED WIRING FOR DAMAGE, NONE NOTED. INSPECTED AC BUS CONTROL FOR DAMAGE, NONE NOTED. INSPECTED FOR ANY CIRCUIT BREAKERS TRIPPED, NONE WERE TRIPPED. INSPECTED APU STARTER WIRES, TERMINALS AND APU GENERATOR WIRES, NO DAMAGE NOTED. REMOVED AND REPLACED APU VOLTAGE REGULATOR AND APU AC GEN CONTROL PANEL. APU GENERATOR AND VOLTAGE REGULATOR OPS CHECKED GOOD IAW DC-9 MM 24-20-02-5-0, ALSO CROSSTIE CHECKED GOOD FOR THE APU IAW DC-9 1 SERVICE CHECK.