Re: Flight Recorder Durability

From: (David Lesher)
Organization: NRK Clinic for habitual NetNews Abusers - Beltway Annex
Date:         29 Dec 95 22:22:23 
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Cali brings to mind a question I've had for some time.

Has there even been any move toward redundant CVR/FDR's?

I know, short of being being cast out of pure neutronium or such
they are pretty rugged.

While some are lost in the incident (I recall reading of one such
case recently - tail section destroyed - but the details escape me)
itself, other cases have had prior damage that rendered it
worthless.  I've heard, for example, that the modern FDR are more
frail so than the old "scribe on stainless foil" ones. (Anyone know
what the MTBF really is?)

Granted they are not cheap, as shown by the FAA foot-dragging
on upgrading 737 FDR's; but would not dual units -- in diverse
locations, pay off in just one incident?
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