As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. AIR INTERRUPT, EMER DECLARED, LANDING UNEVENTFUL. & ACFT NOT OVERWEIGHT. DURING CLIMB, THE FLIGHT ATTENDANTS REPORTED SMOKE & FUMES IN THE CABIN. FUMES DISSIPATED DURING RETURN TO FIELD. ACCOMPLISHED CAR MCM 21-96-01 & FOUND APU OIL INGESTION. APU OIL GEARBOX CHIP DETECTOR WAS FOUND TO BE LEAKING. R & R APU MAGNETIC DRAIN PLUG IAW AMM 40-90-12. LEAK CHECK GOOD.