As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN ROUTE TO MEDICAL, THE CREW SMELLED FUEL VAPORS IN CABIN & IDENTIFIED FUEL ON RT PAX DOOR WINDOW. THE PILOT MADE A NORMAL LANDING. THE MECHANIC RESPONDED & IDENTIFIED THAT THE FUEL CAP HAD NOT BEEN PROPERLY SEATED WHEN INSTALLED. HE RESEATED THE GAS CAP & WIPED UP EXCESS FUEL OFF WINDOW & AIRFRAME. THE PILOT THEN PERFORMED A GND RUN & FLIGHT CHECK TO VERIFY THAT THE ISSUE WAS RESOLVED. NO FURTHER FUEL LOSS WAS DETECTED & ACFT WAS RETURNED TO UNRESTRICTED SERVICE.