As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED HAZE AND SLIGHT ODOR ON TAKEOFF IN CABIN SWITCHING FROM APU TO ENGINE BLEEDS ON TAKEOFF. CLEARED AFTER 5 MINUTES. MAINTENANCE INSPECTED AND REPLACED THE NR 2 AIR CYCLE MACHINE AND REMOVED OIL FROM OVERSERVICED APU. OPERATIONAL CHECKS WERE GOOD.