As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COCKPIT ODOR OIL SMELL - STRONG OIL SMELL AFTER 1-HOUR IN CRUISE FLIGHT (FL410) IN COCKPIT THROUGH NACA VENTS.// SIGN-OFF // COMPLIED WITH NJA ENVIRONMENTAL CONTROL SYSTEM DUCT BURN OUT TASK CARD # TC-5XL-21-120902M. ALL CHECKS GOOG AND NO BURNT OIL SMELL AT THIS TIME.