It is not about how long it took. It's because the pilots forgot to pull the circuit breaker. In most crashes, both recorders lose power so it's not a problem.

It is not about how long it took. It's because the pilots forgot to pull the circuit breaker. In most crashes, both recorders lose power so it's not a problem. In cases like this and the plane is fine, the pilots need to pull the breakers. Recorders have been found months after accidents and still retain all data.