takata
Originally Posted by Bearfoil
…. In 447's case, it was not THS authority that was desired, it was the desire (seemingly unaddressed, or ignored) to defeat it, to zero it. ….
bearfoil
… The only hesitancy I have is I am nonplussed the crew would apparently leave out the THS in the recovery attempt. …
As a distant observer listening to all you experts being puzzled by the non-use of manual trim, I am in turn puzzled by your puzzlement.
We know that the training departments of the airlines had strenuously opposed
any mention of the use of manual trim in training for upset recovery, even though the test pilots of both Boeing and Airbus had emphasized more than a decade ago that bringing the a/c into trim was in their opinion the first priority in a recovery.
So I assume (I don’t know) that
if the crew had had upset recovery training (as distinct from training to recover from an approach to a stall) the use of manual trim would not have even been mentioned, and they may even had had warnings against its use (because of the danger of structural damage).
So why are you puzzled by the non-use of trim? They followed their training, which in part told them to forget what they were told in primary training, particularly WRT stalls. They were never trained to use manual trim. It wasn’t even mentioned.
QUESTION: Being a French crew for a French airline and knowing that any deviation from training and SOP might be investigated by a French Court, might they have been inhibited from deviating from training and/or SOP in case they might be blamed for any subsequent damage?
The crew were probably unaware of the characteristics of a deep stall and had never experienced one. One of Gums’ early posts mentioned a deep stall as being “just like cruise flight”. So while on this subject, how many of you experts are happy with the recent upset recovery screed which lists as one of the indications of a stall as “Buffeting”? While this is true, there is still no mention of the
possibility of a buffetless stable stall. Are you all happy with this omission?
An unrelated QUESTION (my apologies if this was already been answered 2,000+ posts back):
From where did the BEA get their 107 kts
ground speed on impact with the sea?