International Civil Aviation Organisation (ICAO) recommends the following to Contracting States: Helicopters for which the certificate of airworthiness is first issued after 1 January 2003 shall be equipped with a CVR with a recording duration of two hours.Fixed-wing aeroplanes with a maximum take-off mass of more than 5 700 kg and for which the certificate of airworthiness is first issued after 1 January 2003 shall be equipped with a CVR with a recording duration of two hours and.Fixed-wing aeroplane and helicopters shall be equipped with a cockpit voice recorder with a recording duration of at least 30 minutes of its operation.
The CVR records and stores the audio signals of the microphones and earphones of the pilots’ headsets and of an area microphone installed in the cockpit.įigure 1: Cockpit Voice Recorder ICAO RequirementsĪccording to the provisions in ICAO Annex 6 “Operation of Aircraft”, Vol I: Cockpit Voice Recorder (CVR) - a device used to record the audio environment in the flight deck for accidents and incident investigation purposes.
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