Famed Australian crocodile wrangler Matt Wright urged friends to "torch" evidence and tried to pressure a hospitalised witness after a fatal helicopter crash, prosecutors have told his trial.

The former Netflix star is accused of three counts of attempting to pervert the course of justice over the crocodile-egg-harvesting disaster in 2022.

Mr Wright's friend and Outback Wrangler co-star Chris "Willow" Wilson, who was suspended from the aircraft in a sling, died when it hit the ground. Pilot Sebastian Robinson also was seriously injured.

Mr Wright has pleaded not guilty, and his defence team deny he tampered with any evidence.

In their opening address to the Northern Territory (NT) Supreme Court, the prosecution said it was not alleging that Mr Wright was responsible for the crash, but accused him of interfering with the investigation.