CNN The Situation Room April 11, 2014 22:30:00
From the british aaip. operator procedures for preservation were not sufficient in the case of an incident. revised procedures require the commander to secure the recordings. in other words, if you think there's going to be a need for the cockpit voice recorder, you pull the plug so that it doesn't continue to record over it. a smack on the wrists. >> they lost the data from that cockpit voice recorder. the actual box, they had, but it was useless since they let it record over those two hours, those final two hours. the "reuters" news agency has a detailed report on the blunders, i guess that'...
Source: archive.org