What was found
AT CRUISE, FLIGHT ATTENDANTS COMPLAINED MIGRAINE HEADACHE, TREMBLING AND SCRATCHY THROATS. FLIGHT DIVERTED TO BNA AND EMERGENCY WAS DECLARED. REPAIRED OIL LEAK AT APU. FOUND DRAIN PLUG AT APU GENERATOR LOOSE WHICH HAD SLIGHT LEAK. SECURED DRAIN PLUG. NO FURTHER LEAKS NOTED.