As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
1 MEDICAL CREW MEMBER SEATED IN THE R/H AFT REAR FACING SEAT ON THE RETURN LEG BACK TO BASE NOTED A FAINT FUEL SMELL. THE SMELL WAS NOT NOTICED BY THE SECOND MEDICAL CREW MEMBER OR PIC. MAINTENANCE WAS NOT ABLE TO NOTE A FUEL SMELL UPON INSPECTION OF THE AIRCRAFT. THE AIRCRAFT WAS SUBSEQUENTLY RELEASED FOR AN OPERATION CHECK FLIGHT WITH ZERO DEFECTS NOTED.