As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACRID OILY ODOR IN A/C AIR FOLLOWING HYDRAULIC SERVICING W/BOTH PACKS RUNNING OFF APU BLEED. ACP TASK FIM 21-00-830 SMOKE OR FUMES IN CABIN SOURCE UNKNOWN. RAN BOTH ENGINES FOR 5 MINUTES RAN BOTH PACKS AND VERIFIED NO ODOR IN FLT DECK AND WALKED THROUGH CABIN.UNABLE TO DUPLICATE ANY OIL ODOR OR FUMES IN CABIN.ALSO SWITCHED BOTH PACKS TO RUN ON APU PNEUMATICS AND NO ISSUE. ACP FIM 21-00-830 TO ITEM F.