A320飞机维护手册 AMM FLIGHT CONTROLS 飞行操纵3(138)

-the THS actuator stops (after
approximately 5 seconds), - on the upper ECAM DU:
-the ELAC 2 PITCH FAULT message
comes on,

 -the OFF legend of the FLT CTL/ELAC 2 goes off.
-if the THS actuator does not stop, do the operation test of the THS-actuator electrical control (Ref. TASK 27-96-00-710-022) and do the necessary corrective action.
On the panel 24VU:
-the OFF legend of the FLT CTL/ELAC 2
switch comes on, - on the upper ECAM DU:
 -the ELAC 2 PITCH FAULT message goes off.
-all remaining pressure in the valve blocks of the THS actuator is released.
On the LH threshold-box assy:
 (Ref. Fig. 503/TASK 27-44-00-991-004)

-the control-valve detent of the "JAMMED" control-valve becomes recentered (which was possibly opened by the ELAC 2 ground setting command) when you hear a "CLICK".

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ACTION RESULT -------------------------------------------------------------------------------
R R
R 12. On the LH control-valve block R (2) of the THS actuator (4):
R - remove the TOOL - JAMMING R SIMULATION from the splined R end of the control-valve R shaft.
 Subtask 27-44-00-710-053
-at the same time the reference marks on the input plate and the ball carrier of the control-valve detent must be in line.
R C. Do the test in the mechanical mode of the LH valve block.
 CAUTION : BE CAREFUL WHEN YOU INSTALL OR REMOVE THE JAMMING SIMULATION
_______ TOOL. PUSH OR PULL THE TOOL AND TURN THE MECHANICAL INPUT SHAFT AT THE SAME TIME. DO THIS UNTIL YOU FIND THE POSITION WHERE YOU CAN INSTALL OR REMOVE THE TOOL EASILY. THIS WILL PREVENT DAMAGE TO THE VALVE CONTROL SHAFT AND THE TOOL.
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1.
 Pressurize the Green and Yellow Hydraulic systems (Ref. TASK 29-23-00-863-001).

 2.
 Do the operational test of the jamming protection device again, in the mechanical mode as follows:

R On the center pedestal:
R - Turn the pitch trim-control
R wheel to the 5 degree nose UP
R position.

 3. Depressurize the Green and Yellow hydraulic systems. (Ref. TASK 29-23-00-864-001).
The THS surface moves to the aircraft 5 degree nose UP position.

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R  4. On the LH control- valve block 
R  (2) of the THS actuator (4): 
R  - install the TOOL - JAMMING 
R  SIMULATION LH A/C N.DN 
R  (OU190857) on the shaft (7) of 
R  the LH control- valve block. 
R  (Ref. Fig. 502/TASK 27-44-00-
991-003) 
R  - push the TOOL - JAMMING 
R  SIMULATION on the splined end 
R  of the shaft (7) of the LH 
R  control-valve. 
R  - turn the mechanical input shaft 
R  (1) to turn the master spline, 
R  until the spigots of the tool 
R  engage with the slots of the 
R  valve block (2). 
R  - fully push the tool to insert 
R  the spigots in the slots. 
R  (Ref. Fig. 502/TASK 27-44-00-
991-003) 
R  5. On the THS actuator (4): 
R 
R  - move the mechanical input shaft 
R  (1) in a Clockwise (CW) 
R  direction.
 6. Pressurize the Green and Yellow 
R  hydraulic systems (Ref. TASK 29-
R  23-00-863-001). 
R 
7. On the center pedestal: 
R  - look at the pointer on the 
R  pitch trim-control wheel. 
R  Immediately before the 0 degree 
position is reached, turn the
 wheel in the nose up direction
 to give a slight back order.

On the THS actuator (4):
-the control-valve chain is in the jamming simulation configuration.
On the control-valves of the THS actuator:
-
the control-valves are in the open position.

On the center pedestal:

-
the pitch trim-control wheel moves to the aircraft nose DN direction (the THS leading edge moves up).

On the THS actuator (4):

-
the jamming protection device is operated and the THS actuator (4) stops immediately.