As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, SMELL OF FUEL IN COCKPIT. FA REPORTED SMELL OF FUEL IN THE CABIN. SMELLED STRONGER TOWARD THE REAR OF CABIN. (FLIGHT 5137) FOUND APU FUEL SHUT OFF SOLENOID VALVE LEAKING. REMOVED AND REPLACED THE APU FUEL SHUT OFF SOLENOID VALVE REF AMM 49-31-05. OPS CHECK GOOD, LEAK CHECKED GOOD.