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Old 27th March 2001 | 18:02
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Cornish Jack
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Post 744 Ignition operation?

Greetings all
Would anybody care to offer info on this, please?
Event button print-out with continuous ignition switched ON showed only two of the four ignitors operating. Doing a similar check with nacelle anti-ice selected ON gave similar results. Does anybody know what the EIU memory shot is tracking? Is it the physical operation of the ignitors- (unlikely, since the MM check for operation is to LISTEN for the cracker boxes) or is it just looking for the logic triggers being made/unmade? Additionally, is an event record so instantaneous as to miss the ignitors if they were being flip-flopped or sequenced in some other way?

This was triggered by a query from one of our crews and I can't find anything directly relevant in the MM.
Thanks in advance.