As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 7805 AIR TURN BACK. AFTER TAKEOFF, THE PILOT REPORTED A FUEL SMELL IN THE COCKPIT. THE PILOT ELECTED TO RETURN WHERE THE ACFT WAS GNDED. NO EMER WAS DECLARED. TROUBLE SHOT & FOUND TWO LOOSE B NUTS ON THE FUEL FLOW TRANSMITTER. TIGHTENED B NUTS TO SPEC, TEST RAN & LEAK CHECKED. ACFT RETURNED TO SERVICE.