PPRuNe Forums - View Single Post - AF 447 Thread No. 12
View Single Post
Old 9th Aug 2017, 23:52
  #1579 (permalink)  
Concours77
 
Join Date: Nov 2016
Location: Lakeside
Posts: 534
Received 0 Likes on 0 Posts
Moreover, no additional stall warning or stick shaker is needed with this kind of protection. Stall warning is only re-introduced on airbus aircraft when the angle of attack protection is lost (loss of normal laws)...."

ASHWG LAA Report_15 March 2010 Final Version_Appendix 1

Fair enough. What of performance after reversion to alternate Law? Stall Warn should compel action. If ignored, or dismissed, there is no other resolution for Airbus pilot. Shaker is unmistakable, irrevocable and emphatic compulsion to act.

So. Why the waiver from FAA? I would understand the waiver if clearly limited to Normal Law, the alpha Prot is its own Stall Warn, and cannot be overridden.

Alternate Law is a "different" airplane, should it not be required to meet minimum standard of other aircraft?

Does there not seem to be a large omission here, gums?

Each time the crew experienced the STALLWARN, it should have been preceded by a stick shaker.

If, in AltLaw, the "cannot Stall" morphs into an aircraft that can not only Stall, but does so so subtly that a separate device must be required ?

It occurs to me that if the shaker was shaking without stop all the way down they may have tumbled to the state of the aircraft?
Concours77 is offline