As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, PILOT SMELLED FUEL. AFTER LOOKING AROUND THE COCKPIT, PILOT NOTICED A SMALL FUEL STAIN ON THE COPILOT'S CARPET. THE ACFT IMMEDIATELY DEVERTED TO THE NEAREST AIRPORT. AFTER TROUBLESHOOTING, FOUND FUEL FLOW INDICATOR FLEXABLE FUEL HOSE PETRIFIED AND SEEPING FUEL DUE TO AGE. R & R FLEXIBLE RUBBER FUEL LINE TO FUEL FLOW INDICATOR USING 111 (MIL-H-8795) ASSEMBLED FUEL HOSE.