27-21-01
 ALL  ú ú 01 Page 416 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
 S 094-033
 (5)  Disconnect the sling from the rudder.
 S 434-034
 (6)  Install the blanking screws to fill the holes for the sling.
 S 714-035
 (7)  Move the lower rudder slowly, with your hand, to the fully right and the fully left position.
 S 714-036
 (8)  Make sure the rudder moves freely and smoothly.
 S 434-101
 (9)  Do these steps to install the power control package (PCP) for the lower rudder.
 (a) (b) (c) (d) (e) (f) (g) (h) (i) (j)  Make sure the bolt assembly (24) has all of these parts: housing assembly (19), cap (18), washers (17), cap screws (16), and lockwire on the cap screws.Do these steps to install the bushings (12, 21) on the bolt assemblies (9, 24). 1) Apply adhesive to the bushings (12, 21). 2) Push the bushings (12, 21) against the heads of the bolts with a minimum force of 70 pounds.Apply a thin layer of grease to the bolt assemblies (9, 24).Align the actuators with their attachment fittings.Install the bolt assembly (24) in the lower actuator.Make sure the bolt assembly (24) engages the antirotation stop (20).Install the summing lever support (15).Install the washers (30, 28), and the bolts (31, 29) in the summing lever support.Install the washers (26), and the collar (25).Tighten the bolt (31).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-21-01
 ALL  ú ú 01 Page 417 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (k)  
Install the washer (22) and the nut (23) on the bolt assembly (24). Tighten the nut to 1100-1200 pound-inches more than the run-on torque.

 (l)  
Install the bolt assembly (9) in the upper actuator.

 (m)  
Make sure the bolt assembly (9) engages the antirotation stop (10).

 (n)  
Install the washer (13) and the nut (14) on the bolt assembly (9). Tighten the nut to 1100-1200 pound-inches more than the run-on torque.

 S 434-042
 (10)
 Do this step to connect the control rod of the position transmitter to the front spar of the rudder:

 (a)  
Install the bolt (32), the washer (33), and the nut (34).

 S 214-110
 (11)
 Make sure the seals for the lower rudder do not have damage.

 S 224-111

 (12)
 Make sure the seals have the correct clearances (Fig. 403).

 S 864-112

 (13)
 Find the switches for the FLT CONTROL HYD POWER on the Pilot's Overhead Maintenance Panel, P461.

 (a)  
Put the TAIL switches in the NORM position.

 S 864-113
 (14)
 Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P180, DC Power Distribution Panel,
 1) 180H8 ELEV/RUD VLV SYS 1
 2) 180E7 ELEV/RUD VLV SYS 2
 3) 180H23 ELEV/RUD VLV SYS 3
 4) 180E22 ELEV/RUD VLV SYS 4

 (15)
 Remove electrical power if it is not necessary (Ref 24-22-00/201).

 S 864-114
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 27-21-01
 ALL  ú ú 01 Page 418 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 734-138
 (16) Do the procedure to do a test of the upper and lower rudder.
 NOTE: It follows the procedure to install the upper rudder.
____
 TASK 27-21-01-004-133
 4.  Upper Rudder Removal (Fig. 404)____________________
 A. Special Tools and Equipment
 (1)
2MIT65B04011-41 Nose Gear Rig and Tow Safety Pin

 (2)
ST2580-267 Spanner Wrench Adapter Set

 (3)
G27012-44 Sling Assembly, Upper Rudder

 B.
Standard Tools and Equipment

 (1)
Crane

 (2)
Load Positioner (For 850 Pounds minimum), 3734T51, McMaster-Carr
　
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