Final answer:
If an aircraft's CVR is non-functional while the FDR is operational, the ability to fly will depend on aviation authority regulations. The CVR and FDR are generally required for commercial flights, and without a functioning CVR, the aircraft may need to be repaired or may only fly to a maintenance facility with special permission.
Step-by-step explanation:
If your aircraft doesn't have a functioning Cockpit Voice Recorder (CVR) but has a functioning Flight Data Recorder (FDR), the decision on whether you may fly will depend on the regulations set by the aviation authority that governs the airspace in which you intend to operate. Generally, for commercial operations, both the CVR and FDR are required by international aviation standards, set forth by the International Civil Aviation Organization (ICAO), and individual country regulations might vary. In many cases, if the CVR is not functioning, the aircraft may need to be grounded until repairs can be made, or a special permit may be required for ferry flights to a maintenance facility. However, for some smaller operations or under certain exceptional circumstances, exemptions may be granted on a case-by-case basis.
It's important to note that both the CVR and FDR play critical roles in air safety, with the CVR recording cockpit conversations and sounds, which can help in determining the cause of an accident, and the FDR collecting data on various flight parameters. Compliance with these requirements ensures not only legal operation but also safety and the ability to thoroughly investigate incidents.