According to @CNBC, flight data recorders (FDR) and cockpit voice recorders (CVR) have become the core evidence sets investigators rely on to reconstruct flights and determine crash causality, making recovery and data download timelines central to the pace of an inquiry; source: CNBC. @CNBC reports that crash-hardened black boxes are engineered to preserve flight parameters and cockpit audio through extreme impact and fire, enabling authorities to sequence events and issue evidence-based safety directives after major incidents; source: CNBC. @CNBC outlines that the workflow from locating beacons to completing lab readouts defines when official updates emerge, providing the foundation for subsequent regulatory findings and operational changes across fleets; source: CNBC.