As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OILY SMELL THROUGHOUT ACFT ESPECIALLY STRONG IN COCKPIT. IN ALL PHASES OF FLIGHT. ACCOMPLISHED MT 72-016 RAN ENGINES AT HIGH POWER ISOLATED AND ACCOMPLISHED PACK BURN OUT. REPLACED LT AND RT RECIRC FILTERS. NO OIL SMELL FROM ANY SOURCE NOTED ON RUNS.