Date: 07 Oct 98 02:49:10 From: JF Mezei <firstname.lastname@example.org> References: 1 2 3 4
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David Lesher wrote: > But retrofitting THAT will be very costly. The FAA would not even > get behind upgrading the existing ?5-7? channels scribed on > stainless ribbon system still in wide use in 737's.... It is one thing to say that retrofitting existing aircraft is too costly, but it is another to prevent enhancing the systems so that new aircraft would have more redudant systems. The FARs already stipulate that the recorders must stop on their own within a certain amount of time following a crash. All that is needed is for engineers to be tasked to handle events when power is lost prior to the crash so that the recorders can continue to make recordings of whatever is left. (just because power is cut to the recorder does not mean that power has been cut to the rest of the aircraft, and it also does not mean that power is all cut at the same time, hence by having the recorder continue for a small while, it could record the sequence in which equipmenty had total failure and by stopping at the actual impact time, it gives investigators the exact time of the crash (something which they lack for SR111, they can only guess at).