I have this annunciation in the WAAP always before take off. After take off it desappears, what is it?
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Rudder Throw-Limiter Operation
(1) Rudder travel is limited at normal cruising speeds by the rudder throw-limiter actuator.
Maximum rudder travel is 22 degrees left or right of neutral position, and a light on the annunciator panel is on when the rudder travel is unrestricted.
(2) As airspeed increases, air pressure enters the chamber of the throw-limiter actuator and moves the actuator piston.
The piston, through mechanical linkage, positions a hook in the slot in the hydraulic power package actuating cylinder piston rod to limit rudder travel. Rudder travel is decreased progressively as airspeed increases, until at high airspeeds, rudder travel is restricted to 2 1/2(±1/2) degrees (0.044(±0.009) rad) 1 5/8(±5/16) inch (41.28(±7.94) mm to left and right of neutral position.
(3) A switch on the rudder hydraulic power package is actuated on the first rudder travel restriction, causing the rudder travel unrestricted light to go off.
The rudder travel unrestricted light on the annunciator panel will come on as hook withdraws from the actuating cylinder pushrod.
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