The Indonesian Carrier Lion Air’s Boeing 737 Max 8 jet set off from Jakarta killed all 189 people on board.  A certain protocol  for a faulty sensor, that may cause a plane to  lose altitude is suspected  to have brought down the plane . So the Directorate-General of Civil Aviation has asked SpiceJet and Jet Airways to follow certain protocol.  The way of handling circumstances stemming from incorrect data from “angle of attack” sensors were advised to the airlines by Boeing.  “Within three days of receipt of the FAA’s airworthiness directive, changes to the Airplane Flight Manual have to be done for procedures which have to be followed by flight crew,” the DGCA said in a statement. “This condition, if not addressed, could cause the crew to have difficulty controlling the airplane and lead to excessive nose-down attitude, significant altitude loss and a possible impact with terrain,” the regulator said. “Jet Airways’ Max aircraft continue to fly in compliance with the airworthiness directive issued by the manufacturer and the regulatory authorities,” an airline spokesperson said.  Boeing said earlier that investigators probing the Lion Air crash had observed that the Boeing 737 Max 8 plane witnessed an incorrect reading from one of the ‘angle of attack’ sensors.