As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRZ AT FL330, SMOKE IN CABIN WHEN AIRFOIL A/I TURNED ON. SMOKE DISSIPATED WHEN A/I TURNED OFF. FOUND APU TO BE LEAKING OIL AND DISTRIBUTED INTO PNEUMATIC SYSTEM, RENDERED APU INOP. RAN ENGINES TO TAKEOFF POWER, ALL OK. REPLACED APU.