As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG SMELL OF OIL IN THE COCKPIT WHEN USING THE PACKS WITH APU ON STARTED APU AND OPERATED LEFT AND RIGHT AIR CONDITIONING PACKS IN ALL MODES FROM APU BLEEDS FOR 1 HOUR REFERENCE AMM 49-11-00 AND 21-00-00 WITH NO OIL SMELL COMING FROM VENTS IN COCKPIT AND CARGO AREAS. INSPECTED APU BLEED DUCT. NO OIL OR CONTAMINATION PRESENT IN DUCT. NO HISTORY FOUND.