As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT LEG RETURNING TO BASE FROM PATIENT DROP OFF THE CREW MEMBER IN THE BACK SAID THEY COULD SMELL FUEL. I COULD NOT AND HE STATED THAT HE HAD THE WINDOW OPEN. WHEN I ASKED HIM TO CLOSE THE WINDOW I COULD THEN SMELL THE FUEL UP IN FRONT OF THE CABIN. REMOVED OBSTRUCTION FROM FUEL VENT.