In the Court's decision yesterday, Justice Stephen Kos referred to psychiatric reports detailing Orchard's history with mental illness, after developing post-traumatic stress disorder (PTSD) following an incident in 2013.
The Judge cited the "adequate evidence" in the reports which stated that Orchard's condition contributed to his actions, as well as his willingness to undertake treatment for his disability.
Orchard was driving his partner and children to Kerikeri in January 2016 when he became upset after a text message she received.
He then began shouting at his partner, who had a protection order against him, about how he had "nothing left to lose".
He then unbuckled her seat belt, and drove the passenger side of the car into the lamp posts, eventually flipping the car on to the passenger side.
Orchard pleaded guilty to one charge of wounding with intent to cause grievous bodily harm, two of common assault and one of breaching a protection order. The original sentence was longer as the Judge considered Orchard's condition a danger to his family.
However, the Court of Appeal decided that since Orchard's PTSD contributed to the offending, the offence was mitigated.
Orchard was also disqualified from driving for six months, starting from when he is released from jail.