As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER STARTING APU CABIN DEVELOPED A STRONG FUEL SMELL. (FLT 4486) INSPECTED APU, ENGINES, AND SURROUNDING AREA FOR SIGNS OF FUEL LEAK, NOTHING NOTED. RAN PACKS WITH APU BLEED AND EACH ENGINE'S BLEEDS SEPARATELY. NO STRONG ODOR NOTED. AIRCRAFT OKAY FOR SERVICE.