Historical aircraft types

REG	type	ICAO
N328DU	BCS3	a38c66
N521DT	A21N	a68d02
N539DN	A21N	a6d234
N530DE		a6b0bd
N506DA	A21N	a65086
N516DA	A21N	a67805
N515DE	A21N	a67452