What was found
SEVERAL MINUTES INTO CRUISE FLIGHT, THE MEDICAL CREW NOTICED THE STRONG SMELL OF FUEL IN THE CABIN. PILOT PERFORMED A PRECATIONARY LANDING AT THE NEAREST AIRPORT (2I3). A QUICK WALK AROUND THE HELICOPTER FOUND THE FUEL CAP WAS ON AND LATCHED, BUT NOT SECURED PROPPERLY, ALLOWING FUEL TO ESCAPE AN RUN UP THE REAR OF THE HELICOPTER. THIS CAUSED THE STRONG FUEL SMELL IN THE CABIN. THE PILOT REMOVED, INSPECTED, THEN CLOSED THE FUEL CAP CORRECTLY, LOGGED THE DISCREPANCY IN THE LOG BOOK, AND FLEW BACK TO HOME BASE WITHOUT INCIDENT. THE MECHANIC WAS ON THE FIELD, LOOKED AT THE HELICOPTER AND FOUND NO DISCREPANCIES WITH THE FUEL CAP.