What was found
TWO HOURS 20 MINUTES INTO FLT, THE HYD 3 OFF WITH 2.5 GALLONS ON CONFIGURATION OF GEAR HYD 3 FAILED. TROUBLESHOT IAW FIM 29-10-08, HYD QTY LEVEL 1.8 IN SYS 3, FOUND A LARGE AMOUNT OF HYD FLUID LEAKING FROM TAIL. AFTER FURTHER INVESTIGATION. FOUND THE NR 3 SYS HORIZONTAL STAB PRIMARY CONTROL VALVE FITTING LEAKING , REPLACED THE O-RING AND BACK-UP RING. SERVICED THE NR 3 HYD SYS IAW MM 12-13-02. LEAK AND OPS CHECKED GOOD IAW MM 27-43-00-5.