What was found
THE CREW REPORTED A HEAVY FUEL SMELL IN COCKPIT AND CABIN ON START OF NR 2 ENGINE. THE AIRCRAFT WAS REMOVED FROM SERVICE. PERFORMED NORMAL ENGINE START/SHUTDOWN IAW AMM 71-00-00 NO DEFECTS NOTED. RAN THE AIRCRAFT FOR A LONG PERIOD OF TIME IN VARIOUS ENGINE BLEED AND AIR CIRCULATION MACHINE CONFIGURATIONS. NO SMELL NOTED REF EMB MM 21-20-00 AND 71-00-00 AND ETN EM-72-034. NO PARTS REMOVED OR REPLACED. THE AIRCRAFT WAS RETURNED TO SERVICE.