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Big Question, DFDR w/SDAC

UnderTow
post Sep 1 2006, 12:05 AM
Post #1





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http://usread.com/flight587/letter_to_FAA_by_NTSB.html

Letter from NTSB to FAA re the Filtering Problem in the Flight 587 Flight Data Recorder
by Victor Trombettas

{snip}
On February 6th, 2002, the NTSB Chairman, Marion Blakey, sent a letter To the FAA's Administrator addressing the issue of "vital" flight control position data that was filtered (or averaged) by the System Data Analog Converter (SDAC) before it was sent to the Digital Flight Data Recorder (DFDR) on board Flight 587.
...
Unfortunately, when the FAA informed the NTSB in 1996 that several airplane manufacturers were compliant with accurate FDR requirements, that list did not include Boeing and Airbus.
{end snip}

Might be something to check up on.
Does/Did Boeing 757-2 (and AA77) have a SDAC? If so, what does it do?
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Posts in this topic
- UnderTow   Big Question   Sep 1 2006, 12:05 AM
- - driver   "Unfortunately, when the FAA informed the NTS...   Sep 1 2006, 06:53 AM
- - driver   "Does/Did Boeing 757-2 (and AA77) have a SDAC...   Sep 1 2006, 07:14 AM
- - UnderTow   Thanks very much driver. I know what it did essent...   Sep 1 2006, 09:39 AM
- - driver   What really matters concerning this topic is if so...   Sep 1 2006, 12:43 PM
- - UnderTow   The only answer to that we have, at this time, is ...   Sep 1 2006, 01:09 PM
- - driver   The only answer to that we have, at this time, is ...   Sep 1 2006, 02:11 PM
- - UnderTow   Just this:   Sep 1 2006, 02:34 PM
- - UnderTow   Also, concerning your question in the Throttle thr...   Sep 1 2006, 02:38 PM
- - driver   Thanks for providing that explanation. Obtaining ...   Sep 1 2006, 03:25 PM
- - tocarm   Data from the DFDR would serve but to confirm ATC ...   Dec 15 2006, 12:08 PM
- - johndoeX   tocarm.. please check your PM's... Welcome to...   Dec 15 2006, 02:52 PM
- - johndoeX   For the laymen out there... CDU = Central Display...   Dec 15 2006, 02:57 PM
- - Cary   Welcome to the forums tocarm. You seem to have so...   Dec 15 2006, 05:08 PM
- - tocarm   Dear Rob, Regarding "B-types"... Boein...   Dec 17 2006, 11:41 AM
- - tocarm   Dear Cary, Regarding my "expertise", I...   Dec 17 2006, 12:01 PM
- - johndoeX   QUOTE Regarding "B-types"... Boeing 707...   Dec 17 2006, 01:02 PM
- - avmech   QUOTE (tocarm @ Dec 17 2006, 10:41 AM)Dear Ro...   Dec 20 2006, 12:56 PM
- - jo56   757-200 Background Info from Boeing site: http://...   Dec 23 2006, 01:23 PM
- - johndoeX   QUOTE (avmech @ Dec 20 2006, 11:56 AM)these t...   Dec 23 2006, 02:02 PM
- - aerohead   DFDAU digital flight data acquisition unit   Feb 3 2011, 02:22 AM


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