As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU SMOKE (BOTTLE DISCHARGED, IAW SMF THERE IS OIL LEAKING FROM APU AND APU OIL QTY IS ZERO. IAW FLIGHT CREW DISCHARGED BOTTLE, NO FIRE WARNING INDICATION WAS PRESENT. NOTIFIED BY MX POSSIBLE APU FIRE. DISCHARGED ON BOTTLE. REMOVED AND REPLACED OUTBD. FIRE BOTTLE, REMOVED AND REPLACED AGENT NR 1 DISCHARGE CARTRIDGE. APU FIRE EXTINGUISHING SYSTEM OPS. CHECKED GOOD. APU R & R ON 26JAN11.