Re: ATR-72's and Airbuses

Date:         08 Dec 96 04:12:42 
From:         wangermn@barder.Princeton.EDU (Pablo Wangermann)
Organization: Laboratory for Control and Automation Princeton University
References:   1 2 3 4
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In article <airliners.1996.2381@ohare.Chicago.COM>,
Scott Odle <s_odle@earthlink.net> wrote:
>In article <airliners.1996.2202@ohare.Chicago.COM>, wangermn@barder.Princeton.EDU says...
>
>>The ATR42/72 did pass all the FAA icing test requirements during
>>certification.  All planes out there have to pass these tests.  However,
>>the icing conditions that caused the crash (supercooled droplets) is pretty
>>rare and is not part of the certification requirement.  Now, it is clear
>>given the accident and a couple of other incidents that the ATRs need
>>better de-icing to cope with these conditions.  However, I've seen no reports
>>on whether any other aircraft have had control problems that were due to
>>similar icing conditions.  I believe the FAA or NTSB mused about testing
>>other types of aircraft under similar conditions, but with the icing tanker
>>now decomissioned I'd say the chances of that happening in the near future
>>are minimal.  I wouldn't trust _any_ prop in those icing conditions.  (I
>>think this was part of ATR's argument - the pilots knowingly flew the plane
>>in severe icing conditions - a definite no no.)
>
>The FAA did indeed research most or all other aircraft to see which may
>have a problem and they did indeed test them before the tanker was
>decommissioned.  Also, the loss of the tanker does not mean it will never
>be done again, besides the tanker is only a small part of what is necessary
>for the testing.

Well, as a regular AvWeek and Flight reader, I've somehow missed the
results from this testing.  Could you give us a summary of how other
aircraft performed?

John Wangermann