PPRuNe Forums - View Single Post - Air Asia Indonesia Lost Contact from Surabaya to Singapore
Old 17th Dec 2015, 00:54
  #3817 (permalink)  
_Phoenix
 
Join Date: Jan 2015
Location: Near St Lawrence River
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Hey Gums, see the graph in reference below at page 112.
http://www.bea.aero/docspa/2008/d-la...a081127.en.pdf

At the bottom of page, the flight law switched from normal to direct = "intuitively" alternate law + landing gear extended, between 15:45:15 to 15:45:40. See the purple and green curves are proportional, however the elevator is at 75% (12.5 deg out of of 17 deg) for stick at full ND.
Note: Interesting for pitch in alternate law, the stick to elevator relationship, is opposite ?!
As per FCOM, the pitch in direct law is a direct stick-to-elevator relationship (elevator deflection is proportional to stick deflection). However, maximum elevator deflection varies as a function of CG. No protections are available.
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