PPRuNe Forums - View Single Post - B777 logic - balked landing/GA after touch down
Old 6th Aug 2016, 11:25
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safetypee
 
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The thread starts an interesting tech question, which might be better considered by asking why a pilot would need to know, and if so is this an essential function, i.e. should know / must know.
All of this suggests 'clumsy use of automation'. If the logic is essential, then explain why, but don't expect pilots to remember or recall obscure facts in remote corners of operations, particularly in time critical, high workload, or rarely flown manoeuvres.
With this view the function is a classic latent 'factor', waiting to catch the unwary and under resourced pilot in a rare situation; yet it is something which apparently meets the certification requirement.
If the function is an essential requirement, then describe it, add cautions about use in unusual circumstances. If not, then reconsider the design and certification, ... but then there is cost, risk, etc all driven from the manufacturers position; it easier to recommend more training, monitoring, etc; but do these actually work, would they work in this situation.
What we must learn from the question is to challenge the design and certification assumptions in increasingly complex (but rare) operational scenarios; not a safety report as why the human forgot, a report of the poor implementation of technology and documentation.

"The Clumsy Use of Computer Technology page 113 onwards
  • ... the supervisor of automated resources must not only know something about how the system works but also know how to work the system.
  • ... relatively easy for pilots to lose track of the automated systems' behavior during high-tempo and highly dynamic situations ...

    And page 122 onwards

  • computer-based devices that influence cognition and behavior in ways that increase the potential for erroneous actions and assessments can be considered flaws in the human-computer cognitive system.
  • One factor that contributes to clumsy use of technological possibilities is that new technology is often designed around "textbook " or routine scenarios."
Quotes from 'Behind Human Error: Cognitive Systems, Computers, and Hindsight'.
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