Bearfoil wrote:-
RTLU fail/prior limit is reported as 7.9degrees, full sweep, by inspection.
If you are referring to the AF447 rudder, the recovered RTLU provided a limit function based on a +/- deflection of 7.9° either side of the centered position, i.e. a total "sweep" of 15.8°.
The best description on the design criteria and in service use I have seen can be found at:-
http://pilotlab.net/aircraft-manufacture/airbus/rudder-loads.pdf
mm43