Tomcat VIP:
Plz clarify for the audience: How many of the so called ‘black boxes” are on an AB 320 1990 model/Newer models?? Is the data of the FDR recorded in a separate box??
There are two “Black boxes” A Cockpit voice recorder (CVR) and a flight data recorder (FDR) They are mounted together at the back of the aircraft. Both recorders are similar in construction with the data being recorded in highly strengthened sections of each recorder. The FDR records about 25 hrs of data and the CVR records between half an hour to two hours of radio, intercom and ambient flight deck noise.
As you can probably guess when the FDR is analysed they can filter out a lot of the background noise so that is probably how the co pilots breathing was picked up.
A lot of the switches and knobs in the flight deck have distinctive clicks when operated and can be recognized by an experienced 320 crew. The click of the door lock is quite distinctive and the rate of climb/decent knob on the mode select panel clicks as it is rotated.
As for the rapid released of information. A lot of it has been leaked so that has forced their hand. Also the lack of information in the Malaysian Airlines case has cause so much pain for the relatives and created allsorts of bizarre conspiracy theories that, perhaps the French decided to avoid all of that. Mind you some people are still trying!
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