As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ICT - FLT 487 - AT GATE SHORTLY BEFORE TAKEOFF, FLIGHT ATTENDANT REPORTED HEAVY SMOKE AT COCKPIT. GROUND PERSONNEL REPORTED FLAMES AT APU AREA. CREW IMMEDIATELY SHUT DOWN APU AND REMOVED ALL POWER FROM AIRCRAFT. REPLACED APU. INVESTIGATION DETERMINED OIL COOLING FAN WAS LEAKING OIL WHERE IT MOUNTS TO THE APU. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)