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> The reason interviews are so important is because there’s no cockpit voice recorder (CVR) of the incident, as that only records for two hours, and is then overwritten; since the pilots continued flying to London, this critical evidence isn’t available to investigators

JFC. How are they allowed to have such useless technology for something so important?

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My guess is that these rules are so old that it would have been a technological burden to keep longer recordings at the time. I wouldn’t be surprised if they are using a tape recorder on a loop.

Technology is one thing. I'm wondering why the crew weren't required to hand in the CVR right after the incident.

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