Subtask 27-24-00-010-054
 E. Get Access
 (1)
 Put the adjustable access platform in position at zone 325.

 (2)
 Open the access panels 325CL, 325CR, 325DL (Ref. TASK 55-33-13-010-001).

 Subtask 27-24-00-860-053
 F. Aircraft Maintenance Configuration
 (1)
 Install the PIN - RIGGING (98D27207546000) (7) or RIGGING PIN SET (98D27207516000) on the output bellcrank of the lower servocontrol (4).

 (2)
 Install the pointer of the LOAD APPLICATION TOOL - ELEVATOR, AILERON, RUDDER (98D27303000001) on the trailing edge of the rudder.

 (3)
 Pressurize the aircraft hydraulic systems (Ref. TASK 29-24-00-863-001) (Ref. TASK 29-23-00-863-001) (Ref. TASK 29-10-00-863-003).

 4. Procedure
_________ (Ref. Fig. 501/TASK 27-24-00-991-003) Subtask 27-24-00-420-050
 A. Installation of the Reference Triangle for the Rudder Neutral Position (Ref. Fig. 502/TASK 27-24-00-991-004)
 NOTE : Do this installation only if the reference triangle on the tail
____
 cone is not in position.

 NOTE : If the initial adjustment of two servocontrols at least is not
____ changed, you can find the rudder neutral position without a tool. If two or three servocontrols are not adjusted correctly, you must use the TOOL - RUDDER NEUTRAL ADJUSTMENT (98D27203001000) to find the rudder neutral position.
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R  Rudder Control Figure 501/TASK 27-24-00-991-003
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 Reference Triangle for the Rudder Neutral Position
 Figure 502/TASK 27-24-00-991-004
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 (1) Find the rudder neutral position with two servocontrols adjusted correctly.
 (a)
 Pressurize one of the two servocontrols adjusted correctly.

 (b)
 Make a mark on the tail cone structure to show the position of the rudder lower trailing edge.

 (c)
 Pressurize the other servocontrol adjusted correctly and depressurize the first one:

 1_ On the maintenance panel 50VU:
 Make sure that the HYD/LEAK MEASUREMENT VALVES/ applicable
 pushbutton switch is pushed (on this pushbutton switch the OFF
 legend is off):
 - for the lower servocontrol (4): G pushbutton switch
 - for the middle servocontrol (3): Y pushbutton switch
 - for the upper servocontrol (2): B pushbutton switch.
 2_ Release the two other HYD/LEAK MEASUREMENT VALVE pushbutton
 switches (on these pushbutton switches the OFF legends come
 on).

 1 On the maintenance panel 50VU:
_ Push the HYD/LEAK MEASUREMENT VALVES/ applicable pushbutton switch (on this pushbutton switch the OFF legend goes off):
 -
for the lower servocontrol (4): G pushbutton switch

 -
for the middle servocontrol (3): Y pushbutton switch

 -
for the upper servocontrol (2): B pushbutton switch.

 2 Release the other HYD/LEAK MEASUREMENT VALVE pushbutton switch
_ (on this pushbutton switch the OFF legend comes on).
 (d) Make sure that the rudder neutral position for this servocontrol is the same as the rudder neutral position for the other servocontrol. The rudder lower trailing-edge must be in line with the mark on the tail cone.
 NOTE : If the rudder neutral position is the same for the two
____ servocontrols, it is not necessary to use the TOOL -RUDDER NEUTRAL ADJUSTMENT (98D27203001000). If the rudder neutral position is not the same for the two servocontrols, you must use the TOOL - RUDDER NEUTRAL ADJUSTMENT (98D27203001000).
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 (2) Find the rudder neutral position with the TOOL - RUDDER NEUTRAL ADJUSTMENT (98D27203001000): (Ref. Fig. 503/TASK 27-24-00-991-005)
 (a)
 Depressurize the aircraft hydraulic systems (Ref. TASK 29-10-00-864-003) (Ref. TASK 29-23-00-864-001) (Ref. TASK 29-24-00-864-001).

 (b)
 Put the warning notices to tell persons not to pressurize the aircraft hydraulic systems: - on the overhead panel 40VU - on the ground service panels 197CB, 198CB, 197EB.

 (c)
 Put the TOOL - RUDDER NEUTRAL ADJUSTMENT (98D27203001000) in position.

 (d)
 Use the tool to make the reference mark on the tail cone. If necessary, remove all the other marks on the tail cone.

R (3) Install the new reference triangle (8) on the tail cone, put its R center on the mark (Ref. TASK 11-00-00-960-001).
　
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