As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LGA-FLIGHT 3920 CREW REPORTED WITH POWER LEVERS AT FLIGHT IDLE BLEED AIR SMELLS OILY AND MAKES EYES BURN. MAINTENANCE CHECKED BOTH OIL LEVELS AND FOUND THEM TO BE PROPERLY SERVICED. AIRCRAFT GROUND RAN WITH BOTH BLEEDS ON FOR 20 MINUTES. OPERATIONAL CHECK WAS GOOD ON THE GROUND. AIRCRAFT RETURNED TO SERVICE. AS A FOLLOW UP ON 18 MARCH 2003, RIGHT ENGINE ASSEMBLY SERIAL NUMBER 121354 WAS REPLACED DUE TO A HISTORY OF ODOR IN BLEED AND OIL CONSUMPTION.