Historical aircraft types

REG	type	ICAO
N529DT		a6aaba
N508DA	A21N	a657f4
N527DE	A21N	a6a33f
N517DN	A21N	a67bc8
N534DT	A21N	a6bfa6
N515DE	A21N	a67452
N513DA	A21N	a66ce0