(3)
Depressurize the reservoirs of the Green, Yellow and Blue hydraulic systems. (Ref. TASK 29-14-00-614-001).
Subtask 27-24-51-010-050-A
D. Get Access
(1)
Put the access platform in position.
(2)
Open the access panels 325BL, 325CL, 325CR, 325DL at the trailing edge of the vertical stabilizer. (Ref. TASK 55-33-13-010-002).
Subtask 27-24-51-480-050
E. Installation of the Rigging Pins
(Ref. Fig. 401/TASK 27-24-51-991-001)
(1)
Install the rigging pin 98D27207516330, part of the RIGGING PIN SET (98D27207516000), or the PIN - RIGGING (98D27207548000) in the differential lever (4).
(2)
Install the rigging pin 98D27207516090, part of the RIGGING PIN SET (98D27207516000), or the PIN - RIGGING (98D27207546000) in the bellcrank assy (6) at the servo control 1025GM (5).
(3)
Install the rigging pin 98D27207516040, part of the RIGGING PIN SET (98D27207516000), or the PIN - RIGGING (98D27207545000) in the travel limitation unit (3).
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R Rudder Access Panel and Rigging Pin Locations Figure 401/TASK 27-24-51-991-001
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4. Procedure
_________
R **ON A/C 001-003, 051-054,
Subtask 27-24-51-020-052
A. Removal of the Rudder Servo Control 1025GM/2025GM/3025GM
CAUTION : USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN
_______ YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU USE THE SECOND WRENCH, YOU WILL NOT LOOSEN OR TIGHTEN THE UNION TOO MUCH.
NOTE : If you must remove the three servo controls 1025GM/2025GM/3025GM
____
remove them in this sequence for easy removal:
-upper servo control 2025GM - Blue hydraulic system,
-center servo control 3025GM - Yellow hydraulic system,
-lower servo control 1025GM - Green hydraulic system. Complete the installation, adjustment and test of the upper and center servo controls before you remove the lower servo control.
NOTE : The removal of the upper servo control only is described. The
____ removal of the center servo control and the lower servo control is almost the same.
(1) Remove the cable assembly and the clamp (only at upper servo control 2025GM) as follows: (Ref. Fig. 402/TASK 27-24-51-991-002)
(a)
Remove and discard the cotter pin (13).
(b)
Remove the nut (12).
(c)
Remove the screw (9) and the washer (8) from the clamp (10) and the eye-end (11).
NOTE : Do not disconnect the cable from the structure unless a
____ new installation is necessary.
(2) Disconnect the hydraulic system as follows:
(Ref. Fig. 403/TASK 27-24-51-991-003)
(a) Put the container below the hydraulic connections (30),(37) to collect the unwanted fluid.
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Rudder Servo Controls
Figure 402/TASK 27-24-51-991-002
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Rudder Servo Controls Figure 402A/TASK 27-24-51-991-002-A
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Servo Control Connection at the Vertical Stabilizer
Figure 403/TASK 27-24-51-991-003
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(b)
Disconnect the union nut (38) of the pipe (37) from the union
(39)
at the pressure port of the servo control (5).
(c)
Disconnect the union nut (29) of the pipe (30) from the union
(28)
at the return port of the servo control (5).
(d)
Drain the remaining hydraulic fluid into the container.
(e)
Put the blanking caps on the pipes (30),(37).
(f)
Put the blanking caps on the unions (28),(39) of the servo control (5).
(g)
Remove the screw (31) and the washer (32) and disconnect the bonding jumper (33) from the servo control (5).
NOTE : Do not disconnect the bonding jumper (33) from the
____ structure unless a repair or a new installation is necessary.
(3)
Disconnect the spring rod (21) from the input lever (17) of the servo control (5) as follows: (Ref. Fig. 403/TASK 27-24-51-991-003)
(a)
Remove and discard the cotter pin (27).
(b)
Remove the nut (26), the washer (25) and the screw (18).
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