The Australian Civil Aviation Safety Authority (CASA) has grounded Aero-Tropics after it allegedly failed to meet pilot training and safety standards.
Aero-Tropics was served with a notice to ground all aircraft at 6pm (AEST).
The grounding comes after a 10 month investigation into training and the checking of pilots at the airline.
The airline will be grounded for at least five days.
CASA will now apply to the Federal Court for a 40 day extension to the grounding. (AAP)