This is one in an ongoing series of articles on Winglets that will summarize past airlines and other operators of CRJ aircraft that are no longer in existence. PLUNA – PLUNA Líneas Aéreas Uruguayas S.A. IATA Code: PU ICAO Code: PUA Callsign: PLUNA Flag carrier airline of Uruguay Operated 1936-2012 Number of CRJs Operated: 13 CRJ-900 …