ToplineSurveillance footage from a repair facility where a metal door plug was reinstalled to an Alaska Airlines 737 was overwritten by Boeing, according to National Transportation Safety Board chair Jennifer Homendy, as federal investigators demand more information from Boeing after the door plug blew off mid-flight earlier this year.The aircraft manufacturer told federal investigators it had no record of work performed on the door. ... [+] Getty Images Key FactsThe NTSB requested surveillance footage from ...