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Old 23rd Dec 2012, 06:48
  #50 (permalink)  
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Join Date: Sep 2000
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The real issue of "Why the surging" has not been answered.....

More than anything else in this 'report' - I would have expected some in-depth engineering discussion!

".... and the number six nozzle from the right engine was completely blocked."

Well, it takes a solid object to block the size of the 'piss and dribble' nozzle, so what was it? Considering the nozzle is shielded by metal from the fire, it should be possible to analyse the foreign object.

Not done....... which is the crux of the whole event and the ATSB didn't go there.

For an object this large to have got through the fuel pump - WHAT is left in the fuel pump - and hence a blockage to fuel supply to all injectors, causing the surging/overspeed (which a CSU can't capture quickly enough).

No discussion, no examination apart from.......

"The ATSB was unable to determine whether the erratic nozzle spray patterns and blockage of the number six nozzle were due to pre-impact contamination."

The blockage couldn't happen after the engine was feathered, or after the accident.


Five paragraphs only on the Engine and ancillary systems - when this is what caused the sequence of actions which culminated in the accident.

C'mon........
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