Section 16 Machinery and mechanical appliances; electrical equipment; parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers,and parts and accessories of such articles 84 Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof 84 07 Spark-ignition reciprocating/rotary internal combustion piston engines 84 07 10 Aircraft engines Commodity Code Description 84 07 10 00 Aircraft engines