PPRuNe Forums - View Single Post - Engine Failure after V1
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Old 5th Jan 2004, 13:32
  #58 (permalink)  
4dogs
 
Join Date: Jun 1999
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Angry

Timzsta,

Interesting that nobody commented on your misquotation and consequent inability to even grasp the significance of the correct quote:

"Rules are for the blind obedience of fools and the guidance of wise men"

Captain Stable and BlueEagle have dealt with the essential elements of the debate most adequately.

V speeds are certification speeds based on the engine failure scenario. Their relevance to other events that may occur at critical times is limited to a very important parameter - the energy state of the aircraft during the take-off phase.

Having an indication of whether the aircraft can stop or go is important to your decision making, almost as much as knowing when the indications are no longer relevant. Similarly, we need to be careful in translating the lessons from accidents in certain types into something more generic. While the risks of wing spar burn-through during an uncontrolled engine fire may affect some aircraft, will that justify a greater probability of overrun accidents in many other unrelated types because folks emotively ignore the longer history behind our current thinking on being "go" minded within sensible parameters.

SOPs create a decision framework to aid in the safe development of airmanship and useful experience. They provide some certainty in an occupation teeming with variables and choices. The best advice is to thoroughly understand why they direct you in particular ways - there is little progress without understanding the problem that the SOP tries to resolve or avoid.

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