Boeing did not retain security camera footage showing work on Max jet door that blew out, NTSB says

The National Transportation Safety Board (NTSB) has stated that Boeing did not retain security camera footage that might have shown work performed on a door of a 737 Max Jet that later malfunctioned and blew out. The absence of this footage could potentially hinder the investigation into the cause of the malfunction. This seems to be a part of the broader investigation into Boeing following the two fatal crashes involving the 737 Max model in 2018 and 2019.