US FAA yesterday proposed new rules requiring "significant upgrades" to cockpit voice recorders and flight data recorders at an estimated cost to the industry of $256 million. Under an NPRM, CVRs must record the last 2 hr. of cockpit audio instead of the currently required 15-30 min. Also, a 10-min. independent backup power source for CVRs and FDRs will be required. Voice recorders would have to use technology other than magnetic tape, which is vulnerable to damage and decreased ...

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