Re: Swissair MD-11 (SR 111, JFK-GVA) crash off Nova Scotia

Date:         07 Oct 98 02:49:10 
From:         JF Mezei <jfmezei.spamnot@videotron.ca>
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).