An engineer at Boeing said Wednesday that the aircraft company, in rushing to produce as many planes as possible, is taking manufacturing shortcuts that could lead to jetliners breaking apart.“They are putting out defective airplanes,” the engineer, Sam Salehpour, told members of a Senate subcommittee.Salehpour was testifying about Boeing’s 787 Dreamliner, hundreds of which are in use by airlines, mostly on international routes. He spoke while another Senate committee held a separate hearing on the safety …