What was found
AIRCRAFT RETURNED, DUE TO NOSE LANDING GEAR DID NOT RETRACT. AT PLATFORM AIRCRAFT WAS JACKED IAW MM 07-11-00 AND 3 EXTENSION AND RETRACTION CYCLES WERE PERFORMED, DETECTING THE NOSE LANDING GEAR STRUT LOW AND WITH LOW AIR LEVEL. NOSE LANDING GEAR STRUT SEALS WERE REPLACED IAW MM 32-21-02, NOSE LANDING GEAR DOORS ACTUATOR, LOCK ACTUATOR AND THE NOSE LANDING GEAR SYSTEM WERE CHECKED AND TESTED IAW MM 32-30-00, ALL CORRECT. OVERWEIGHT INSPECTION WAS NOT NECESSARY DUE TO AIRCRAFT LANDED WITH 119,729 POUNDS AND MAXIMUM LANDING WEIGHT IS 139,500 POUNDS, BEING WITHIN LIMITS. DURING OVERNIGHT CHECK, A HYDRAULIC LEAK WAS DETECTED IN THE NOSE LANDING GEAR PISTON, SO SEALS WERE REPLACED IAW MM 32-21-02, TORQUE VALUES IN L