RAAF Roulette displays have been cancelled following the discovery of cracks in an Air Force PC-9/A aircraft.
The cracks were found in the nose landing gear folding strut during regular maintenance and engineering reviews.
The RAAF is undertaking an engineering review of the PC-9/A fleet, which supports flying training and the Roulettes, and is assessing the implications of the cracks.
As a precautionary measure, each PC-9/A will undergo an additional engineering review and repairs, before returning to normal flying activities.
An Air Force spokesperson said aircraft were serviced and flown under a strict and controlled airworthiness and safety system.
As the aircraft are reviewed and return to flying, Roulette displays will resume.