Some interesting outcomes from the investigation:
https://www.atsb.gov.au/publications...r/ao-2017-024/
1. Primary cause was the rudder trim being selected full nose left and its lack of detection via the PIC
2. Aircraft was above MTOW by 240kgs which is unlikely to have contributed
3. Two buildings on the perimeter had issues with their building approval
4. Both engines were producing high power at impact.
While the building approval issue did not have an impact, a separate investigation will be of interesting reading:
https://www.atsb.gov.au/publications...r/ai-2018-010/