What was found
LEVELING OFF AT 2200MSL ENROUTE TO PHMMH FLIGHT NURSE IN REAR NOTICED FUEL SMELL AND AS HE MENTIONED THE SMELL THE PARAMETRIC AND PILOT SMELLED IT AS WELL. THE FUEL SMELL WAS SO INTENSE IT WAS BURNING THE EYES OF ALL CREW. IMMEDIATELY RTB UPON REACHING THE BASE AND SHUTDOWN THE ODOR COULD BE SMELLED ON THE EXTERIOR OF THE AIRCRAFT MORE SO ON THE #2 SIDE. FURTHER INSPECTION COULD NOT DETERMINE THE CAUSE, BUT THE SMELL REMAINED EVEN AFTER AIRCRAFT WAS MOVED INTO THE HANGER. CONTACTED MAINTENANCE AND WAS TOLD THEY WOULD COME AND INSPECT.