[Class : 12] Air Craft, Namely, Airplanes And Structural Parts Thereof Namely, Wings, Bodies, Tails, Control Surfaces, Landing Gear, Interconnecting Members, Propellers And Structural Parts Thereof, Rotary Wing Airplanes And Structural Parts Thereof, Helicopters, Structural Parts, Namely, Air Frames, Landing Gears, Main And Tail Rotors, Hydraulic Pumps And Dynamic Part,Thereof Namely Constituent Parts And Components Of The Main Rotor Assembly And Tail Rotor Assembly That Provide Aerodynamic Control Of The Helicopter During Flight Operations, The Constituent Mechanical And Hydraulic Parts And Components Of The Rotor Control System That Provides Inputs In The Nature Of Collective And/Or Cyclic Pitch Inputs To The Main Rotor Assembly And The Tail Rotor Assembly For Control Of The Flight Opeations Of The Helicopter, ************