Documents leaked to an Italian newspaper show that four days before the Costa Concordia sank emails from the ships' technical director show the black box data recorder had broken down.
It was never repaired or replaced, even though the owners of the Costa Cruise Lines insisted the recorders were working on the night of the disaster.
The documents indicate that watertight safety doors designed to prevent flooding were left open. The company also denies that.
The documents also suggest the crew were using unauthorized, outdated maps that were found in the bridge of the ship.