As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT ATTENDANTS REPORTED A STRONG BURNING ODOR NEAR 3L DOOR. MAINTENANCE FOUND APU OIL COOLING FAN LEAKING. REPLACED FAN. ALSO FOUND APU OVER-SERVICED BY 1.25 QTS OIL, CORRECTED TO PROPER LEVEL. CLEANED APU LOAD COMPRESSOR AND REPLACED HEPA FILTERS.