The ATSB is investigating a fatal aircraft accident involving a SOCATA TB-10 Tobago aircraft, registered VH-YTM, that occurred about 3km south-west of Mount Gambier Airport, South Australia on 28 June 2017.
The aircraft collided with terrain. The pilot and two passengers were fatally injured.
The ATSB has deployed a team of four investigators to the accident site with expertise that includes aircraft engineering, technical and human factors.
While on site the team will be examining the site and wreckage, gathering any recorded data, and interviewing any witnesses.
The ATSB will provide an update on its website outlining the facts of the accident within 30 days.