A Boeing 737 last week went missing in the Australian air traffic control system for 30 minutes.
The Virgin Australia aircraft was flying from Sydney to Brisbane, one of the world's busiest air traffic corridors.
Pilots say the missing flight is highly unusual and very serious.
The Australian Transport Safety Bureau said the air traffic control system displayed the wrong symbol and the wrong colour for the flight for 30 minutes. It also displayed less information than usual.
Air traffic controllers became aware of the problem only when pilots on the flight radioed in to the Brisbane air traffic control centre.
Virgin Australia chief operating officer Sean Donohue on Friday issued a statement to the ABC:
"The airline is taking this air traffic control breach very seriously,'' he said.
''The flight crew are trained and experienced in dealing with all situations. They recognised the breach and advised air traffic control immediately," the statement said.
"The aircraft was at no time in proximity of other aircraft. The aircraft has on-board equipment to ensure the required separation is maintained at all times."
Airservices Australia, a government agency responsible for air traffic control, said the plane was never "lost" and it continued to be displayed in the air traffic system.
The ABC reports the ATSB and the Civil Aviation Safety Authority are investigating the incident.
