As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF, F/A REPORTED HAZE IN CABIN WITH ALL 3 SMOKE ALARMS GOING OFF. SMELLED LIKE BURNING SMELL. CAME OUT OF OVERHEAD DUCTING. RETURNED TO PHX. FOUND APU MAG CHIP DETECTOR LEAKING AND OIL INGESTED IN APU INTAKE. REPLACED CHIP DETECTOR AND PERFORMED DUCT BURN OUT PROCEDURE PER M/M 36-10-00-2.