Historical aircraft types

REG	type	ICAO
N724NK	A21N	a9b39e
N716NK	A21N	a9938d
N717NK	A21N	a99744
N730NK	A21N	a9cc41
N726NK	A21N	a9bb0c
N729NK	A21N	a9c631
N720NK	A21N	a9a4c2