What was found
A MAIN HYDRAULIC PUMP FAIL WARNING MESSAGE ILLUMINATED 30 MIN INTO THE FLIGHT. THE CREW FOLLOWED THE QRH, AND CONTINUED ON TO PIT. DURING THE APPROACH INTO PIT, THE LEFT HAND MAIN LANDING GEAR FAILED TO INDICATE A DOWN AND LOCKED CONDITION. THE CREW DECLARED AN EMERGENCY, AND FOLLOWED THE QUICK REFERENCE HANDBOOK ONCE MORE. THE AIRCRAFT CONTINUED THE APPROACH AND LANDED SAFELY IN PIT. MAINTENANCE INSPECTED AND REPLACED THE MAIN HYDRAULIC PUMP, IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 29-11-04. OPERATIONAL AND LEAK CHECKS WERE COMPLETED, AND THE AIRCRAFT WAS RETURNED TO SERVICE.