What was found
AFTER TAKEOFF, CREW NOTICED HYDRAULIC PUMP GRINDING AND RT MAIN GEAR NEVER UNLOCKED. HYDRAULIC SYSTEM PRESSURE WENT TO ZERO, SO CREW PERFORMED AN EMERGENCY EXTENSION OF LT MAIN AND NOSE GEARS. THE CREW RETURNED TO CID AND LANDED WITHOUT INCIDENT. AFTER INSPECTION OF THE RT WHEELWELL, MAINTENANCE FOUND RT DOWNLOCK SWIVEL CRACKED. (X)