UPDATE 11.38am: A MAN trapped in the wreckage of a light plane that crashed at Knockrow has been freed and flown to hospital.
Medical crews have reported the 73-year-old man's injuries as "severe".
He was treated at the scene by a medical crew from the Westpac Life Saver Rescue Helicopter before being transferred to the Gold Coast University Hospital in a serious condition.
9.40am: A LIGHT aircraft has crashed at a private runway at Knockrow this morning, trapping the sole passenger.
The passenger, a 73-year-old Ballina man, was trapped upside down and unconscious in the aircraft.
A Rural Fire Service spokesman said the aircraft came down nose first through trees near Martins Lane.
"The passenger is trapped by the legs," he said. "(He is) unconscious and upside down."
Emergency services received the call just before 9am this morning.
Police from Richmond Local Area Command were told that the ultralight aircraft appeared to stall before crashing to the ground.
A crime scene has been established at the location and will be examined by forensic specialists.
Police have also notified Recreational Aviation Australia and are continuing their enquiries to establish the exact circumstances surrounding the crash.