What is the minimum mass requirement for an aircraft to have Flight Data Recorders (FDRs) fitted?

The requirement for an aircraft to be fitted with Flight Data Recorders (FDRs) is specifically tied to its maximum takeoff mass. The minimum mass threshold is 5,700 kg. This standard is set by aviation regulatory authorities to ensure that aircraft of a certain size, which typically carry more passengers and cargo, have the capability to record critical flight data. These data records are essential for investigations following incidents and for monitoring operational safety across the aviation industry. This regulatory guideline is designed to enhance safety and provide valuable insights into flight operations.