after whistleblowers warn lawmakers the airplane manufacturer routinely dismissed safety concerns and tried to cover up records of shoddy workmanship cnn aviation correspondent pete muntean has bore on this very disturbing testimony the crisis facing boeing has landed on capitol hill in duelling senate hearings wednesday, rapid-fire allegations against the manufacturing goliath once considered to be squeaky clean, every person stepping a boarding a boeing airplane is at risk. boeing concealment led to two crashes and 300 46 deaths the newest whistle-blower claim that boeing's flagship 787 is dangerously put together. >> sam salehpour served as a quality engineer at the 787 factory in south carolina. he alleges that large sections of the fuselage are put together with gaps that are too big. creative thanks, stress and where which over time could cause catastrophic failure,