Safety regulators launched an investigation on Sunday into a “near collision” between two passenger aircraft at Australia ’s busiest airport that injured a crew member. The incident, which involved a Jetstar pilot being forced to apply sudden brakes to avoid crashing into a Qatar Airways jet on Sunday morning, disrupted operations at Sydney airport. “A cabin crew member aboard the [Jetstar] A320 was injured, and there was damage to the connection between the 777 nose gear and aircraft tug” as both planes stopped abruptly, the statement said. Investigators are collecting data from both aircraft, air traffic control, and interviewing crew and tug operators to determine the cause of the near collision, the regulator said. It called for witnesses at the airport to send in any video of the near collision.