What was found
DURING TAKEOFF, THE CREW SAW THE HYDRAULIC FLOW WARNING LIGHTS ILLUMINATE. THE FLIGHT WAS TERMINATED AND THE AIRCRAFT RETURNED WHERE AN UNEVENTFUL LANDING WAS MADE. MAINTENANCE INVESTIGATION REVEALED THAT THE TOP CONNECTION UNION ON HP HYDRAULIC PIPE WAS LEAKING. THE PIPE WAS REMOVED AND INSPECTED WITH NO DEFECTS FOUND. THE CONNECTION ADAPTOR WAS INSPECTED WITH NO DEFECTS FOUND. THE PIPE WAS REINSTALLED AND HYDRAULIC SYSTEM BLED. FULL SYSTEM FUNCTION TESTS WERE CARRIED OUT, AND AN ENGINE RUN AND TAXI TEST WERE COMPLETED. NO EVIDENCE OF FURTHER LEAKAGE WAS FOUND.