PPRuNe Forums - View Single Post - AF 447 Thread no. 4
View Single Post
Old 24th Jun 2011, 07:24
  #337 (permalink)  
HazelNuts39
 
Join Date: Jul 2009
Location: France - mostly
Age: 84
Posts: 1,682
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by sensor validation
same thing as that 2000 A340 AIRPROX?
Quote:
Ten seconds after the autopilot disengaged, the corrected or phase-advanced angle of attack (a computed parameter which is not recorded but can be calculated by Airbus Industrie from the DFDR data) reached the ‘alpha prot’ value. This angle of attack excursion beyond alpha prot caused a change in the pitch flight control law from normal law (NZ law) to angle of attack protection law (AoA law). If both sidesticks are at neutral, the AoA protection law seeks to hold the angle of attack constant at alpha prot until a sidestick pitch command is made.
In normal law (AoA law) no stall warning, no stall: AoA remains at alphaprot.

Last edited by Jetdriver; 24th Jun 2011 at 11:05.
HazelNuts39 is offline