As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED FUEL/EXHAUST SMELL DURING FLIGHT. UPON FURTHER INVESTIGATION, IT WAS REPORTED THEY HAD A STRONG TAIL WIND AND THE SMELL THEY REPORTED WAS EXHAUST FUMES COMING FROM THE EXHAUST. WHEN THEY CHANGE DIRECTION, THE EXHAUST SMELL WENT AWAY.