WASHINGTON/MONTREAL (Reuters) – Pierre Beaudoin is expected to step down as executive chairman of Canada’s Bombardier Inc (BBDb.TO) in early 2016, according to a source familiar with discussions about the issue, a move that could erode family control of the plane and train maker. The source, who was not authorized to speak publicly, said the change was still being discussed and it was not clear who would replace Beaudoin, a member of the family that controls the company.