Flightradar24. The outage started just after 3pm, affecting operations across arrivals and departures. A hiccup with communication systems at the Melbourne Air Traffic Service Centre forced delays at airports in Melbourne, Adelaide and Perth from 5pm AEDT on Tuesday. A 20 metre section of Perth Airport's runway has been damaged after a Qantas flight took off on Sunday. Some international flights have had to depart without luggage to meet weight restrictions on.