The “black box” data recorder from a crashed Lion Air jet shows its airspeed indicator malfunctioned on its last four flights, investigators said on Monday, just hours after distraught relatives of victims confronted the airline’s co-founder. National Transportation Safety Committee chairman Soerjanto Tjahjono said the problem was similar on each of the four flights, including the fatal flight on October 29 in which the plane plunged into the Java Sea, killing all 189 people on board.