As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT AFTER APU START, SELECTED APU AIR ON PACKS ON ISOLATION VALVES ON PACKS 1 2 3 ON. STRONG FUEL ODOR IN COCKPIT DISSAPATED AFTER SEVERAL MINUTES. AFTER TALKING WITH THE CREW, THEY SAID THEY SMELLED FUEL WHEN THEY GOT TO THE COCKPIT BEFORE THE APU WAS RUNNING. REMOVED AND REPLACED APU NOZZLE ACTUATOR.