As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR CONDITIONING PACK NR 1 PRODUCING AN OILY SMELL & NOT COOLING VERY WELL. PERFORMED A NR 1 PACK OPS CHECK IAW AMM 21-51-00. PERFORMED ETN -EM -72-034-ENG ODOR EVENT TROUBLESHOOTING. NO ODOR WAS DETECTED AND SYS WAS COOLING PROPERLY. OPS CHECKED GOOD. NO DEFECTS NOTED.