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Old 25th Apr 2011, 20:06   #108 (permalink)
DingerX
 
Join Date: Jul 2002
Location: Confusio Helvetica
Posts: 273
e message ne peut pas être la trace d’un reset, ce qui exclut notamment la possibilité d’un arrêt manuel. Ce message pourrait être la conséquence d’une incohérence entre les deux chaînes internes du FMGEC (COM et MON). Une telle incohérence pourrait elle-même être la conséquence de valeurs erratiques des paramètres d’entrée. Quoi qu’il en soit, les seules conséquences d’un tel message ne peuvent être que le désengagement d’automatismes dont les messages cockpit effect associés ont déjà été émis à 2 h 10.
Le caractère « INTERMITTENT » signifie que l’anomalie a duré moins de 2,5 secondes.

Translation: This message cannot be due to a reset, which excludes in particular the possibility that it was manually shut off. This message could be due to a disagreement between the two internal channels of the FMGEC (COM AND MON). Such a disagree could, in turn, be the consequence of erratic input values.
Whatever the case may be, the only possible consequences of such a message can only be the disengagement of automation whose associated cockpit effect messages were already transmitted at 0210.
"Intermittent" means that the anomaly lasted less than 2.5 seconds.

Well, to be precise, the message doesn't have consequences, rather whatever sent the message would have also instructed the A/P to disengage if it were engaged. That's "only possible": they are not making any statement on the A/P status.
They are also implying that if the flight crew "reset" the FMGEC by turning it off and on again, there would be a different set of messages (otherwise, I cannot see how they can claim that it "excludes the possibility" -- it only excludes the possibility that this message was generated by a reset, not that a reset occurred previously or after).

I will now join -gums- in shutting up (but not in his insight, alas).
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