What was found
INSPECTION TYPE:NA**DIVERSION - NO EMERGENCY DECLARED - NO EQUIP USED - LANDED UNEVENTFULLY - AC TAKEN OOS** LVL 1 HYD 2 OFF ALERT, 1 HOUR INTO FLIGHT FL 340. ON FINAL LVL 2 HYD 2 FAIL ALERT. HYD QTY # 2 DOWN TO 1.2 GALLONS. CREW THEN REPORTED THEY HAD LOST F/O'S NAVIGATION DISPLAY.FOUND PLUG ON TOP OF #2 SYSTEM HYD MANIFOLD LEAKING AT O RING, REPLACED O RING & RETAINER W/REF TO 00-INTRO 2.B ACCOMPLISHED LEAK CK W/REF TP M/M 29-12-40, LEAK CK GOOD. ACCOMP #2 DEU RTS IWA AMM 36-61-02. NO DEFECTS NOTED AT THIS TIME.