As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW SMELLED FUEL IN THE CABIN ON A FLIGHT TO PICK UP A PATIENT. MADE A PRECAUTIONARY LANDING. INSPECTED ENTIRE FUEL SYS AND COULD NOT LOCATE ANY LEAKS. RAN BOTH BOOST PUMPS AND RE-CHECKED FUEL SYS. NO LEAKS NOTED. PERFORMED A GROUND RUN, & COULD NOT FIND ANY LEAKS. PERFORMED A 10 MINUTE MX TEST FLIGHT AND COULD NOT DUPLICATE THE DISCREPANCY. ACFT RETURNED TO SERVICE.