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Old 7th Jul 2009, 19:48
  #3217 (permalink)  
PEI_3721
 
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Ref post 3193 {surplus 1}, this uses a similar ‘backwards’ deduction path as AstraMike {post 3179}, and then invokes some structural failure to maintain the spin. I haven’t seen any reference or evidence of structural failure, so how is this line of thought justified?

Returning to previous posts on the rudder limiter (maximum rudder deflection). The limit angle is a function of CAS and is computed by the SECs (A330 controls description). With a double SEC failure, the system freezes at the limit value. This condition may have been induced by the ADC faults / shutdown, but in the process of ‘failing’ due to parameter comparison, the ADC may have registered quite a low value of CAS. IIRC the comparator trips with a discrepancy greater than 60kts IAS. Thus, if the IAS value was low, then the rudder limiter may have frozen at quite a large angle; … perhaps a point for future reference.
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