As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: FUMES SMELLED THROUGHOUT AIRCRAFT; AIRCRAFT RETURN TO GATE SAFELY AT LGA. PERFORMED J/C 08L00021001. COULD NOT DUPLICATE FUEL ODOR THROUGHOUT A/C. PERFORMED REMOVAL OF OIL CONTAMINATION FROM THE AIR CONDITIONING SYSTEM, PER AMM 21-00-01.