As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 789 LGA-CLT - RETURN TO FIELD - LGA ATC TOWER REPORTED BLACK SMOKE FROM NR 2 ENGINE ON TAKEOFF. CREW HAD NO COCKPIT INDICATIONS OF ANY PROBLEM. NO EMERGENCY WAS DECLARED. AIRCRAFT RETURNED TO FIELD. MAINTENANCE FOUND LEAKING GASKET AND REPLACED PER AIRBUS MAINTENANCE MANUAL 73-21-10-000-002.