What was found
EWR---CO2517, CREW REPORTED, "FUEL ODOR WHEN OPERATING AIRCONDITIONING PACKS WITH APU RUNNING." MAINTENANCE PERFORMED OPERATIONAL CHECK OF AIRCONDITIONING SYSTEM (WITH APU RUNNING)IAW EMB145 AMM #21-51-00. OPS.CHECKED GOOD. NO ABNORMAL ODORS NOTED. AIRCRAFT RETURNED TO SERVICE. (SUSPECT WINDS BLOWING UP THE APU TAILPIPE.)