The Hawk 127 fighter trainer, attached to RAAF Williamtown's 76 Squadron, landed without incident at the airport on August 13 after apparently clipping high voltage power lines between Dorrigo and Armidale.
Two gaping holes could be seen in the jet's left wing on arrival at the airport.
The incident sparked a major response from Coffs Harbour's emergency services, and a visit by two Defence Department investigation teams.
On Wednesday afternoon the jet was seen on the airport tarmac and the deafening roar of its engines were heard for many kilometres when crews undertook ground airworthiness tests.
A Defence spokeswoman said the damaged wing had been replaced and the airworthiness tests and engineering assessments were completed.
“The aircraft will be flown back to RAAF Williamtown some time in the next two weeks,” she said.
The investigation into the cause of last month's incident continues, and the repair costings are yet to be finalised.
Want to know more?RAAF jet in high drama at Coffs airport