The Directorate General of Civil Aviation (DGCA) has asked Jet Airways (India) Ltd to explain why it allowed a trainee pilot to land a packed flight in Mumbai in October 2011, violating safety norms.The regulator has summoned the airline’s chief of flight safety and the chief of operations today after it received a complaint this month that the airline had failed to report to the regulator that a commander allowed a trainee pilot to land the flight. Bharat Bhushan, Director General of Civil Aviation, said the airline “hushed up” the case and promised to take action against the carrier’s executives. “Such a serious matter where the supernumerary was asked to land a plane full of passengers...what can be more unsafe? We are surprised that we didn’t know about it. They hushed it up. This is completely unacceptable,” he said. “We have suspended the two pilots. We are going to take action against the airline, the people who were responsible for this, including the chief of safety.”