Historical aircraft types

REG	type	ICAO
N509DT	A21N	a65bbc
N540DE	A21N	a6d83c
N520DE		a6893e
N508DA	A21N	a657f4
N817DN	B739	ab23b5
N507DZ	A21N	a65454
N511DE	A21N	a66576