Historical aircraft types

REG	type	ICAO
PR-YSI	A20N	e49866
PR-YSR	A20N	e49ec9
PR-YSC	A20N	e49591
PR-YRZ	A20N	e494b4
PR-YRK	A20N	e4936a
PR-YRU	A20N	e49446