Historical aircraft types

REG	type	ICAO
N609NK	A320	a7e9e4
N991NK	A20N	add790
N603NK	A320	a7d39a
N720NK	A21N	a9a4c2
N992NK	A20N	addb47
N685NK	A321	a91700
N676NK	A321	a8f338