Boeing engineer: Dreamliner improperly assembled, prompting safety probes

• Boeing engineer alleges improper assembly of 787 Dreamliner fuselages, raising safety concerns • Claims Boeing took shortcuts to meet production targets, failing to follow procedures • Engineer says he faced retaliation after raising concerns, including threats of violence • His allegations prompt new investigations by the FAA and a Senate subcommittee • Comes as Boeing struggles with its reputation after recent 737 Max and other incidents