Boeing didn’t maintain the security camera footage that showed work on a Max jet door which eventually blew out, according to a report by the National Transportation Safety Board (NTSB). Safety investigators may now face challenges in determining the true cause of this incident since they lack direct visual evidence. However, they are likely to review maintenance records, talk to the workers involved if possible, and examine the door and surrounding structure for any signs of mechanical failure or improper installation. Boeing might face further scrutiny for their lack of surveillance archival, especially amid ongoing quality-control issues with the 737 MAX planes.