What was found
WITH FLAPS SET AT 15 DEG, WHEN LANDING GEAR PLACED FROM OFF TO DOWN, A SYS HYD PRESSURE WENT TO ZERO, A HYD QUANTITY WENT TO ZERO. RAN QRH PROCEDURES. LEFT AND RIGHT MAINS WERE GREEN, NOSE GEAR INDICATING UP PRIOR TO RUNNING CHECKLIST. MANUALLY EXTENDED GEAR AND LANDED UNEVENTFULLY. SYS A FLUID SHUTOFF. SWITCHES CLOSED W/ENGINES RUNNING FOR 20 MINUTES. INSPECTED A/C AND FOUND NLG HYD TRANSFER CYCLINDER SEPARATED INTO TWO PIECES, NLG W/W AREA COVERED IN HYD FLUID. R & R NOSE GEAR HYD TRANSFER CYCLINDER. PER 727 MM 32-35-01-4, C/W STEPS 1-4C REQ STEPS 4D, E, AND F.