As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE ODOR IN CABIN ON TAKEOFF. EMER DECLARED FLIGHT RETURNED & LANDED WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. FOUND AUXILIARY POWER UNIT OIL CAP NOT SECURE & APU OIL INGESTION. PLACARDED APU INOPERATIVE IAW MEL 49-01. ACCOMPLISHED PACK BURN IAW MCM 21-92-12. REPLACED APU ON 08/05/2014.