The Australian Transport Safety Bureau (ATSB) has found a helicopter crashed near Katherine killing the pilot because it had run out of fuel.
The pilot died when his helicopter plummeted to the ground on a cattle station near Katherine in October last year.
The man had been mustering cattle and radio transmissions before the crash reveal he was having trouble getting a bull out of the bush and into the open for workers to catch.
Transport safety investigators say the helicopter then ran out of fuel, causing the engine to stop.
In their report they describe the pilot as being confident and competent, but say he probably missed the red light in the cockpit warning there was little fuel because he was looking out the window focusing on the bull.