As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6120. DURING TAKEOFF CLIMB AND WHEN THE BLEED SOURCE WAS SWITCHED FROM THE APU BLEED TO THE ENGINE BLEED A FUEL ODOR CAME OVER THE COCKPIT & CABIN. CHECKED FOR LEAKS WITH NONE NOTED. RAN APU FOR AN HOUR WITH NO DEFECTS. PERFORMED ENGINE RUN WITH APU ON AND CYCLED PACKS AND BLEEDS. NO FAULTS FOUND.