Subtask 27-22-51-720-051
F. Do the operational test of the rudder trim actuation (Ref. TASK 27-22-00-710-002).
NOTE : If you operate the aircraft in actual CAT 3 conditions, do these
____
tests:
-AFS-Test (Ref. TASK 22-96-00-710-001) and Land Test (Ref. TASK 22-97-00-710-001).
5. Close-up
________ Subtask 27-22-51-410-051-A
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Close the access door 312AR.
(3)
Install the access panel 325BR (Ref. TASK 55-33-13-400-001).
(4)
Close the access panel 325BL at the trailing edge of the vertical stabilizer (Ref. TASK 55-33-13-410-002).
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(5)
Remove the warning notice(s).
(6)
Remove the access platform(s).
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ARTIFICIAL FEEL AND RUDDER TRAVEL LIMITING - ACTUATION
______________________________________________________ DESCRIPTION AND OPERATION
_________________________
1. General
_______
A. Rudder Artificial Feel (Ref. Fig. 001) An artificial feel and trim unit is installed downstream of the cable quadrant. It consists of a trim screwjack (Ref. 27-22) and a constant-resisting load spring-rod that the trim screwjack holds in the neutral position. The artificial feel and trim unit also comprises a system which overrides the autopilot. This system is engaged when the AP mode is selected. The function of the spring rod is:
-
to provide an artificial feel load proportional to the rudder deflection,
-
to provide an accurate centering of the surface to neutral in the absence of a control input,
-
to hold the upstream control at neutral when the yaw damper servoactuator supplies signals to the servocontrol.
NOTE : The centering spring force is added to the artificial feel force
____ that the artificial feel and trim unit supplies (Ref. 27-21).
B. Rudder Travel Limiting (Ref. Fig. 002) The rudder-travel limiting system limits the control inputs to the servocontrols to change the rudder travel in relation to the airspeed (Vc). The limitation is such that the maximum deflection of the rudder remains lower than the deflection which would induce limit loads on the structure, throughout the flight envelope. The system is made of a travel limitation unit which is under the control of the Flight Augmentation Computers (FACs) (Ref. ch. 22). A simplified emergency control system (open loop) brings back automatically the stops to the "low-speed" position when the two FACs are failed and slats are extended.
2. Component Location__________________
A. Rudder Artificial Feel
(Ref. Fig. 003)
-------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA | | | | DOOR | REF. -------------------------------------------------------------------------------ARTIFICIAL FEEL AND TRIM UNIT 325 27-23-41 16CA SOLENOID-RUDDER ARTF FEEL 325 22-31-00
Artificial Feel and Trim Unit
Figure 001
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Rudder-Travel Limiting System
Figure 002
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Location of the Artificial Feel and Trim Unit
Figure 003
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B. Rudder Travel Limiting
(Ref. Fig. 004)
-------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA | | | | DOOR | REF. -------------------------------------------------------------------------------4CC LIMITATION UNIT-RUDDER TRAVEL 325 325DL 27-23-51
Travel Limitation Unit - Location
Figure 004
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C. Maintenance and Rigging Facilities.
The item given below is a Line Replaceable Unit (LRU):
-Electronic assembly The levers and the casing have rigging holes which materialize the neutral position of the levers, for adjustment of the rods connected to them. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM FLIGHT CONTROLS 飞行操纵2(95)
