As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACM PRODUCING OILY ODOR AS TEMPATURE SET TO WARMER TEMPERATURE. PERFORMED OPS CHECK OF ACM AT VARIOUS POWER SETTINGS, THRU FULL TEMPERATURE RANGE IN BOTH AUTO AND MANUAL MODES AND SELECTING DIFFERENT BLEED AIR SOURCES. ACM APPEARS TO FUNCTION NORMAL, COULD NOT DUPLICATE OILY ODOR.