What was found
DURING FLIGHT TO 'RUN IN' NEW CYLINDER NR 5 RIGHT ENGINE, 40 MINUTES INTO FLIGHT HYDRAULIC FLOW LIGHTS STARTED TO FLICKER ON AND OFF. WITHIN 10 MINUTES BOTH LIGHTS FLICKERING STAYING ON LONGER. DECIDED TO SLOW AIRCRAFT AND EXTEND GEAR. WHEN ACTUATED ONLY MAINS CAME DOWN AND LOCKED, PUT GEAR DOWN WITH EMERGENCY SYSTEM PER P.O.H., NOSE GEAR LOCKED DOWN, LANDED AIRCRAFT. (X)