What was found
ON DEPARTURE PASSING THRU 12000 FT, ENG 2 LOOP A FAULT WENT ON & OFF. PACK 2 FAULT CAME ON & WENT OFF, MAIN CARGO SMOKE ILLUMINATED FOR 15 SECS WENT OFF, CAME BACK ON FOR 15 SECS & WENT OFF, CAME BACK ON FOR APPROX 1 MIN. COMPLIED WITH ECAM, DECLARED AN EMERGENCY & LANDED. CFR SHOT THERMAL IMAGING & SHOWED NO FIRE INDICATION ON TAXI IN MAIN CARGO SMOKE ILLUM INTERMIT 2-3 TIMES. DURING PREP FOR MAINT, TAXI RUN ELECTRIC HYD PUMP. HAD STRONG ODOR OF HYD FUILD IN COCKPIT. FOUND UPPER CARGO FULL OF HYD MIST. ON FURTHER INSPECT FOUND HYD LINE UNION LEAKING IN LOWER FWD CARGO. FOUND HYD LINE WITH PIN HOLE. R & R HYD LINE. PERFORMED HYDC LINE LEAK CHECK IAW AMM 29-00-00-06 LEAK CHECKED GOOD.