PPRuNe Forums - View Single Post - Crs selectors, B737-800
View Single Post
Old 25th Nov 2008, 14:02
  #10 (permalink)  
Graybeard
 
Join Date: Nov 2006
Location: SoCalif
Posts: 896
Likes: 0
Received 0 Likes on 0 Posts
Normal coupled LOC approach with A/C heading not matching Selected Course is usually due to crosswind. If you are stabilized on approach, the autopilot has whatever crosswind compensated for. If you then change the CRS, it's like a changing crosswind, appearing to the autopilot it requires a new CRS washout, which it soon learns isn't so, as it's main input is LOC deviation.

Not sure I've explained it concisely.

GB
Graybeard is offline