At last the flight data recorder from the crash of a Lao Airlines turboprop ATR-72 has been recovered from the Mekong river. The cockpit voice recorder has been located also but has not yet been retrieved due to the strong currents and muddy water of the Mekong.
The flight data recorder tracks technical data: altitude, speed and route.
A cockpit voice recorder records cockpit conversation. The cockpit voice recorder has not been retrieved, though news releases to the contrary have been circulated.
Lao Airlines most recent press release:
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Lao Airlines Victims Recovered in Mekong River