Cockpit voice recorder 'completely overwritten' on Alaska Airlines plane

Federal officials examining the horrifying midflight blowout of a section of an Alaska Airlines aircraft’s fuselage said the lost piece has been found – a key element in the investigation of what happened during the plane’s “explosive decompression.” Complicating the investigation is the loss of critical cockpit audio recordings because of a device setting, said NTSB Chair Jennifer Homendy. #CNN #News