What was found
ORD - FLT 1547 - VERY STRONG FUMES IN COCKPIT AND CABIN JUST AFTER TAKEOFF ORD. AIRCRAFT WAS SMOKEY WITH FUMES. CABIN FIRE/SMOKE CHECKLIST COMPLETED. FUMES PARTICULARLY STRONG IN FIRST CLASS CABIN. RETURNED TO ORD AND LANDED WITHOUT INCIDENT. REPAIRED HYDRAULIC LEAK TO LEFT AND RIGHT THRUST REVERSER CONTROL VALVE AND RUDDER SHUTOFF VALVE. ACCOMPLISHED PACK BURN. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)