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Old 13th July 2011 | 22:03
  #270 (permalink)  
mm43
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From: NNW of Antipodes
However, when in normal law, regardless of the pilot's input, the computers will prevent excessive maneuvers and exceedance of the safe envelope in pitch and roll axis.
However, as on conventional aircraft, the rudder has no such protection.
The last sentence regarding the rudder is a prime example of the FCOM portraying something in the BASIC PRINCIPLE that turns out not to be true.

Just a few pages back I noted someone suggesting that "plenty of rudder" could have helped the situation, and it is worthwhile repeating that the rudder has two forms of protection, i.e.
  • Rudder Travel Limiter Unit (RTLU) which limits rudder travel between 35° at 150 KCAS and decreasing to 4° at 350 KCAS respectively,
  • Pedal Travel Limiter Unit (PTLU) which provides input dampening.
On latching of ALT2 LAW the rudder was limited for the remainder of the flight to +/- 7.9°.

Last edited by mm43; 13th July 2011 at 22:57. Reason: corrected highspeed KCAS
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