What was found
AIRCRAFT TOOK OFF AND LANDING GEAR FAILED TO RETRACT FULLY. OPERATOR CYCLED GEAR DOWN AND THE RIGHT MAIN GEAR DOWN LOCK LIGHT FAILED TO ILLUMINATED. THE AIRCRAFT RETURNED AND LANDED WITHOUT FURTHER INCIDENT. EVALUATION OF THE SYSTEM REVEALED A LEAK IN THE UPPER RETRACT LINE IN THE NOSE WELL WHERE THE LINE HAD CHAFED THROUGH ON AN ADEL CLAMP. SUGGEST THAT WHEN INSPECTING THE GEAR SYSTEM LINES THAT CLAMPS ARE REMOVED AND RELOCATED FOR BETTER VISUAL INSPECTION/ ANALYSIS.