As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN ACM IS MAKING A LOUD BEARING NOISE WHEN RUNNING. STRONG OIL ODOR ASSOCIATED IN THE CABIN WITH CABIN PACKS OPERATING. OIL ODOR IS STILL PRESENT AFTER PACKS HAS BEEN SHUTOFF FOR 10 MINUTES. BEARING NOISE STOPS WHEN CABIN PACK IS SHUTOFF. TROUBLESHOT, FOUND CABIN ACM SEIZED. REMOVED CABIN ACM IAW MM 21-51-00. INSTALLED ACM. CONTINUE WITH COUPLING INSTALL OPC CHECK. INSTALLED COUPLINGS, AIR CUST LEAK CHECKED GOOD IAW MM 21-51-00.