PPRuNe Forums - View Single Post - TAM A320 crash at Congonhas, Brazil
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Old 14th Sep 2007, 14:06
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RWA
 
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Originally Posted by Lemurian
Yes, I have, both on the sim and in real line operations. There is no problem at all, both on reverse selection and on directional control, even on a wet runway.(
Thanks, Lemurian - pretty conclusive, coming from a serving airline pilot. Except that all the signs are that a vastly experienced pilot (and a training pilot at that) DID make that mistake. What's your personal take on how that highly-unlikely eventuality could possibly have occurred?

Originally Posted by PBL
But it is not as if we are entirely without our own. People who think that the only cause (read "causal factor") was the pilot failing to reduce thrust to idle might do well to read the first few inches of column space of David's article, in which he discusses the runway situation at Congonhas.
Have to disagree to an extent, PBL. This appears to be one accident where the 'primary cause' is pretty clear; the No. 2 TL being left in the 'CLB' detent (or, to be strictly accurate, being recorded by the FDR as being left in the 'CLB' detent, and duly interpreted as such by the systems) resulted in about 55% N1 forward thrust being delivered by the starboard engine throughout the landing run. In addition, and arguably more important, the incorrect TL position prevented ground spoilers and autobraking from being deployed.

That would have made some sort of incident or accident virtually certain.

The pilots applying manual braking a few seconds earlier might have turned a catastrophic overrun into a slightly less serious one; but commonsense says that a serious accident could not have been avoided, whatever the pilots had done, once the original mistake or misreading (both TLs not being retarded to 'idle,' or alternatively the systems not apprehending that they were at 'idle') had been made.
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