As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED A STRONG EXHAUST ODOR IN FLIGHT WITH POWER IN CRUISE. WHEN IN DESCENT THE ODOR SEEMS TO GO AWAY UNTIL POWER IS APPLIED. MX INSPECTED AND PERFORMED TROUBLESHOOTING IAW FIM TASK 72-00-00-810-814. NO DEFECTS WERE FOUND UNABLE TO DUPLICATE. THE ACFT WAS RELEASED FOR SERVICE.