PPRuNe Forums - View Single Post - MAX’s Return Delayed by FAA Reevaluation of 737 Safety Procedures
Old 14th Jun 2019, 09:03
  #406 (permalink)  
PEI_3721
 
Join Date: Mar 2006
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fdr # 398
Yes getting close, but two related issues divide our views.

First, ‘… the technique to unload the trim to gain in trim condition again is able to be taught’ assumes that there will be sufficient control to achieve this, and also time, altitude, etc, in which to recover. A solvable technical issue involving many factors, variables, difficult to bound, apart from the flight test risks in proof.

Second ‘… however with training the recovery would be achievable’, continues the assumption that pilots can be taught to remember, recall, and correctly act in a rare, never expected to be seen situation (cf Wind-shear, CFIT accidents, and both with alerting). Actions are easier to teach than ensuring a consistent and correct identification of the situation - knowhow is not the same as know when. A human issue, which cannot be bounded or assured with any equivalence of a technical system.

Human performance can be deficient with respect to a situation, will the industry accept this risk in the specific situation with potential fatal outcome.

[for those who wish to counter argue with ‘failing to flare’ during landing, consider the likely outcome vs aircraft strength requirements (technical), and training and repeated exposure to the situation (human).]


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