<span style="color: #222222;">A black box from the recently crashed Indonesian jet has been recovered, which could be critical to establishing why the brand new plane fell out of the sky. </span><br />'' <br />'' <span style="color: #222222;">Head of Indonesia's National Transportation Safety Committee, Soerjanto Tjahjono today said, it is yet to be ascertained whether the black box found is a Flight Data Recorder or a Cockpit Voice Recorder. </span><br />'' <br />'' <span style="color: #222222;">The devices record information about the speed, altitude and direction of the plane as well as flight crew conversations. </span><br />'' <br />'' <span style="color: #222222;">A Lion Air Jet, which went into service just a few months ago, had plunged into the Java Sea off Indonesia's northern coast on Monday, killing 189 people. </span><br />'' <br />'' <span style="color: #222222;">Yesterday, authorities picked up the box's signals below the water's surface.</span>