Historical aircraft types

REG	type	ICAO
PR-YSA	A20N	e4950a
PR-YRT	A20N	e49445
PR-YRO	A20N	e493c5
PR-YSF	A20N	e495b2
PR-YSQ	A20N	e49eca
PR-YSG	A20N	e4962d