How Airplane Flight Recorders Function to Provide Detailed Information About Crashes

Airplane black boxes explained, Via Vox

Vox reporter Joss Fong recently took a close look at how airplane flight recorders aka black boxes function to provide details that would otherwise be unavailable, how they came about, their indestructible nature and their use of location technology.

These flight recorders — one stores cockpit audio recordings, the other stores airplane instrument data — are sent to NTSB’s lab in Washington, DC, for analysis. There, officials listen to what are sometimes the pilots’ final, panicked moments of life. They interpret not only what the pilots were saying before the crash but also any snaps, bangs, and alarms captured by the cockpit area microphone. By combining those audio clues with data from the plane’s instruments and sensors, as well as evidence from the scene, investigators can usually determine the cause of the crash, even in cases with no surviving witnesses.

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