Historical aircraft types

REG	type	ICAO
N534DT	A21N	a6bfa6
N517DN	A21N	a67bc8
N506DA	A21N	a65086
N501DA	A21N	a63df3
N526DE	A21N	a69f88
N518DQ	A21N	a67f81
N531DA	A21N	a6b470