As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)FUMES IN THE CABIN WERE CAUSING THE PASSENGERS AND CREW TO BECOME ILL. AN INSPECTION OF THE ENGINE REVEALED #1 ENGINE HAD AN OIL LEAK INTO THE COMPRESSOR SECTION AND THEREFORE INTO THE AIR CYCLE MACHI NE. AIRCRAFT FERRIED BACK TO HOME BASE WITH #1 BLEED SYSTEM TURNED OFF. CAUSE OF OIL LEAK WAS FAULTY #9 BEARING SEAL.