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Old 21st Sep 2008, 05:50
  #1904 (permalink)  
justme69
 
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Unfortunately, there is also a possibility that a faulty WOW switching device MIGHT have resolved itself during the TO roll?

Not likely, as the status change to flight mode was signaled to the DFR soon after rotation was called (still some 20 seconds before the "end" of the accident) and the TOCW alarm didn't sound at all at any time during/after TO.

As it's been explained here by those who know, the sensors (switches) on the gear strut were probably fine and feeding the logic to a large set of relays in parallel, most of which were also probably working fine.

It is a subset of this path that may have been interrupted by either:
-one of the relays not working (i.e. R2-5 coil blew open or switch stuck close)
-or its current interrupted further down (or even before) in the line by a circuit breaker or other cause (i.e. faulty cable, connection, etc).

All these, of course, speculative.

Last edited by justme69; 21st Sep 2008 at 07:02.
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