PPRuNe Forums - View Single Post - AF447 final crew conversation - Thread No. 2
Old 15th Mar 2012, 03:09
  #195 (permalink)  
CONF iture
 
Join Date: Jan 2005
Location: W of 30W
Posts: 1,916
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by A33Zab
Because the RTLU is not a Rudder DEFLECTION Limiter but a rudder INPUT limiter.
I feel a bit uneasy by this statement, I must say.

The RTLU set the position of the rudder limiter (physical limitation). In this case it was between 5 and 6 degrees according to the graph on page 112 of the third Interim Report, but 8 degrees after physical observation as stated in the second Interim Report ... why such difference btw ?

The RTLU ECAM MSG then indicates the unavailability for further rudder deflection limitation calculation function, but the position of the rudder limiter was already frozen.

Nevertheless, at 02:13:00 the rudder reached 10 degrees ... not 'a little overshoot'

Could it be the consequence of the limitation value being unfrozen following a slats extension command ... ?
It is clearly mentioned in the second Interim Report that the flaps were retracted but I have not seen a word on the slats ...

Extending the slats could be an attempt to regain control, kicking the rudder like it was done at 02:13:00 could be another one ...

roulishollandais,
The families are 'parties civiles' and should have full access to the data.
CONF iture is offline