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Old 6th Feb 2015, 15:36
  #304 (permalink)  
FlightSpanner
 
Join Date: Apr 2010
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I'm trying to understand how/why the warning of #2 Engine Flame out was triggered, looking at the FDR plot the warning was @ 02:52:39 yet the drop in #2 ITT, FF & TQ didn't occur until 02:52:40, 1 sec later.

I assume the Flame out warning comes from the FADEC, but how would the FADEC detect this? could it have been a false warning, considering ITT & TQ were still normal?

I'm also assuming that the FADEC reduces Fuel Flow to idle and tries to relight the engine, and that the PLA needs to be returned back to idle and increased in order to command the engine to increase power after this condition.

I don't believe it is a refresh rate issue as you can instantly see #1 Engine produce more power at 02:52:39.
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