UPDATE 5pm: The Air Transport Safety Bureau has launched an investigation into this morning's air crash.
Officers from Coffs Clarence LAC have released new information that the aircraft came down in bushland east of Coffs Harbour Airport when the 46-year-old pilot lost control during aerobatic manoeuvres.
The pilot suffered a fractured skull and ankle, as well as head injuries, and remains in a critical condition at Coffs Harbour Health Campus.
A crime scene has been established and will be examined by forensic specialists.
UPDATE 4pm: It's believed the aircraft which crashed south of Coffs Harbour this morning is a Chipmunk, specially built for aerobatic displays.
Witnesses said the pilot had one passenger on board and was practising when the aircraft got into difficulties and descended rapidly, spiralling as it came down.
Another aircraft nearby watched as the drama unfolded and radioed for assistance, flying in circles around the scene until help arrived.
Initial reports are that the passenger has escaped with some bruising and lacerations.
However, the pilot has suffered more serious head, chest and leg injuries and is being assessed at Coffs Harbour Health Campus.
No further details on their condition are available.
A CRIME scene has been set up around Boambee beach following the crash of a small aircraft this morning.
The aircraft involved is believed to be an ultralight.
Patrons at a nearby rugby league match noticed the aircraft spiralling towards the ground and notified authorities.
While few details are available, it's believed two persons were aboard the aircraft and both escaped with only minor injuries.
Police and air safety examiners are at the scene and have requested the public stay well away from the site.
More details when available.