sentences:  On April 30, 1930 NYRBA was sold to Pan American and, as a consequence, on November 21, 1930 the new owner of the subsidiary renamed NYRBA do Brasil as Panair do Brasil.Regular passenger services began on March 2, 1931 with a flight between Belém and Rio de Janeiro, a journey that took 5 days.This service was later extended to Buenos Aires and the operations enhanced to the point that it took the same 5 days, with overnight stops in Fortaleza, Salvador, Rio de Janeiro and Porto Alegre.