NEW : Full service expected to be restored Sunday morning , the authority says . Obama signs an executive order to create a board to investigate issues . The strike affected 13 lines that serve the suburbs and the Philadelphia International Airport , officials said . This affected 13 lines in the suburbs , Philadelphia International Airport . Lines carry about 500 commuters daily .
NEW : Full service expected to be restored Sunday morning , the authority says . Obama signs an executive order to create a board to investigate issues . This affected 13 lines in the suburbs , Philadelphia International Airport . Lines carry about 500 commuters daily .