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Old 19th Sep 2016, 23:12
  #1677 (permalink)  
4468
 
Join Date: Oct 2004
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Ken
I believe that pilots should be trained that EVERY time he wants increased airspeed and/or altitude that he ALWAYS pushes the thrust levers forward and manually establish the acceleration/climb and THEN pushes the TOGA button to assist him to establish the optimum acceleration/climb rate. Thus in an unusual situation such as this one, he instinctively performs the correct action (manually push the levers forward) and he would not have to know (and under great stress remember) the details of either the RAAS or the TOGA logic to take the correct action. The correct action (push the levers forward) is always instinctive and the automatics are only used to finesse the pilot's already correct action. To me, the worst thing that would result from such training is a short term overtemp or overspeed of the engine (and with modern fadec engines that is unlikely) resulting from moving the levers too aggressively. And this instinctive action will get him (and his passengers) safely away from the ground independent of system logic. Once he is away from the ground and his airspeed is up he can figure out the system logic that's preventing him from getting FD bars and/or autothrottle. Expecting him to figure that out very close to the ground and at very low airspeed is in my mind a recipe for disaster.
I'm afraid we will have to disagree.

On a Boeing, simply pushing the thrust levers forward is absolutely NOT always correct, or advisable! (Though it is on an Airbus, that so many seem to decry!)

Try doing that on a coupled approach, with a decision height below 50R and see what happens.

That's because the TOGA switches don't merely control the thrust levers. They also signal the autopilot and/or flight directors to immediately commence pitch and roll manoeuvres. Or do you advocate simoultaneously selecting the autopilot out too, and looking through the flight directors on every go-around?

Oh and you'll have to continuously push the thrust levers too, because if you don't, auto thrust will be trying to close them! Unless you take that out as well!

As I said in an earlier post, you need to think what other traps your 'solutions' create, and understand why it's not how we do things in modern machinery.

The solution here is more familiarity with this simple manouvre. That's all.

Not simple, this flying business, is it?

Last edited by 4468; 19th Sep 2016 at 23:25.
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