Originally Posted by
DuncanF
What makes no sense was that the CB was pulled to cover up some discussion, as that would imply that they were planning to crash and therefore have the CVR reviewed.
Well that's one explanation, I suppose.
The CVR stopped recording roughly 1 hour 45 minutes before the end of the flight. In the final 30 minutes of recording there was discussion on whether or not to divert to Bogota to refuel.
While the CVR recorded a decision not to do so, it seems highly likely that as the fuel state became more apparent there would have been further debate about how fine they were cutting things. If so, it's no surprise that the crew would not want that discussion recorded.