Loose rivets, # 135,
Your certainty about the technical aspects is not necessarily the same certainty about pilot performance. Technology, aircraft design, and manufacture, can be judged against hard requirements, whilst humans have no published requirements for their ‘construction’, and where output performance is judged by other, ill-defined humans, in situations seldom related to extreme events.
Returning to the thread topic -
trim runway procedure. It appears that knowledge of the procedure and training has decreased in recent years, with new variant aircraft. Yet technical views (# 105
737 Stuck Manual Trim Technique) question the increasing difficulty or effectiveness of the procedure in these newer variants.
These together with the lack of definitive response with quantifying line experience, only add to the unknowns in this topic.
Many test flights, revised revisions of the proposed modification, identification of a simulator discrepancy, and an external review of the procedure across previous variants.
Little or no certainty in any of these.
Not exactly the distinction between science and fiction; but not to judge a book (or person) by its cover
