Final answer:
The Flight Data Recorder (FDR) on an airplane is required to record a minimum of 88 parameters, which include various measurements like flight path, speed, and engine performance that are essential for air accident investigations.
Step-by-step explanation:
The Flight Data Recorder (FDR), a critical component of an airplane's avionics, can record a minimum of 88 parameters. These parameters include flight path, speed, altitude, engine performance, and control surfaces positions. The information collected by the FDR is invaluable for the investigation of an airplane accident or incident, helping to understand the sequence of events leading up to an event.
Modern FDRs are capable of recording hundreds of parameters, and the specific requirements can vary by the type of aircraft as well as the rules of the aviation authority governing that aircraft.