From their site
Rex flight ZL219 operating from Ballina to Sydney landed safely in Sydney at 1.03pm after the pilots received an unsafe nose gear indication in the cockpit.
In accordance with procedures, the aircraft conducted a fly past at Sydney Airport where engineers confirmed the nose gear was extended safely and the crew then carried out a normal approach and landing. As a precaution, the passengers were briefed on emergency landing procedures.
All 17 passengers and 3 crew members were met by Rex staff upon arrival.
hope this helps, it was also on the news for about 2 seconds