What was found
CCR402 - SBEG/KMIA - LOST UTILITY HYDRAULIC SYSTEM AT 16:52. UNABLE TO LOWER DOWN NOSE GEAR BY HAND CRANK AS WELL AS USE OF THE JOHNSON BAR. FOUND UTILITY SYSTEM RELIEF VALVE HOUSING CRACKED. REPLACED VALVE, SERVICED HYDRAULIC SYSTEM AND OPERATIONAL CHECKED SYSTEM. OK PER MM 29-00-00. AFTER AIRCRAFT WAS POSITIONED WITH A CRANE, PROCEEDED TO EXTEND NOSE GEAR PER THE EMERGENCY PROCEDURES, WHICH OPERATED NORMALLY. AFTER REPOSITIONING AIRCRAFT AT THE HANGAR, JACKED ACFT AND OPERATED NOSE GEAR BOTH HYDRAULICALLY AND MANUALLY THROUGH THE EMERGENCY PROCEDURES (WITH THE GUIDANCE OF NTSB) AND FOUND ALL SYSTEMS TO OPERATE NORMALLY.