Victoria's chief police commissioner, Simon Overland, will receive a letter of reprimand for carrying bullets on a domestic flight.
A Melbourne Airport screening officer has been stood down after it was discovered Mr Overland had three bullets in his hand luggage on a flight from Melbourne to Canberra on Friday.
Mr Overland's ammunition was detected only when he passed through security at Canberra Airport on his way to board a return flight. He did not take his gun on the flight, the ABC reports.
The penalty for inadvertently carrying a prohibited item on a plane is jail or a fine of up to $A110,000.
A screening officer in Melbourne failed to detect the bullets by not making a correct assessment of the image.