On 4 May 2024, a Boeing 737-800 descending en-route towards Brisbane encountered unanticipated brief severe convective turbulence passing through convective cloud and three unsecured cabin crew were injured, one seriously who could not then be moved from the rear galley. Risk of injury was found to have been increased by the absence of any company requirement to confirm cabin secure for landing to the flight crew. An absence of company procedures to validate fitness to operate after injury meant that concussion sustained by one of the cabin crew was only detected by colleagues after a premature return to flying duties.