Although the airspace around Mount Galunggung was closed temporarily after the accident, it was reopened days later. It was only after a Singapore Airlines 747 was forced to shut down three of its engines while flying through the same area nineteen days later (13 July) that Indonesian authorities closed the airspace permanently and rerouted airways to avoid the area; a watch was set up to monitor clouds of ash. Flight 9 was not the first encounter with this eruption - a Garuda DC-9 had encountered ash on 5 April 1982.