4/6/1994 PRD 3501-92-100139; Throttle Control Unit (TCU); Device for Controlling Fuel/Air Mixture Entering Aircraft Engine; Control Device, Controller, Heading 8537; Parts of Airplanes or Helicopters, Subheading 8803.30.00, Civil Aircraft Agreement (CAA); Section XVI, Note 2, HQ 953462, HQ 954972, HQ 954992 Dear Sir: