The owners of a ride that killed a young girl at the Royal Adelaide Show in 2014 have been charged.

Adelene Leong was visiting from Malaysia when she was flung from the AirMaxx 360 ride.

SafeWork SA has confirmed charges have been filed against C,J & Sons Amusements Pty Ltd and co-directors Jenny-Lee Sullivan and Clinton Watkins.

The development comes just weeks after charges were filed in the Industrial Magistrates Court against Safe is Safe, the company that inspected the ride, and Hamish Munro, who verified the apparent safety of the ride.

In summary, SafeWork SA said charges against all included failure to provide and maintain, so far as is reasonably practicable, plant in a safe condition.

They also included failure to ensure the device was inspected by a competent person, failure to ensure safe systems of work to ensure the safe operation of the device and failure to provide operators and deck attendants with training and instruction on how to operate the plant safely.

Safe is Safe and Hamish Munro are scheduled to appear in court on June 30 while C,J & Sons and the co-directors are expected to appear on August 11.