S 864-128
(7)
Use the rudder pedals to move the upper rudder to the full right position.
S 864-013
(8)
Find the switches for the FLT CONTROL HYD POWER on the Pilot's Overhead Maintenance Panel, P461.
(a)
Put the No. 1 and No. 3 TAIL switches in SHUTOFF.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-21-01
ALL ú ú 01 Page 404 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 864-015
(9)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P180, DC Power Distribution Panel
1) 180H8, ELEV/RUD VLV SYS 1
2) 180H23, ELEV/RUD VLV SYS 3
S 864-016
(10)
Remove hydraulic power (Ref 29-11-00/201).
F.
Procedure
S 024-130
WARNING: MAKE SURE PERSONS AND EQUIPMENT ARE CLEAR BELOW THE RUDDERS.
_______ OBJECTS CAN FALL AND CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(1)
Do these steps to disconnect the power control package (PCP) from the rudder (Fig. 402).
(a)
Remove the nut (14) at the connection of the upper actuator to the rudder.
(b)
Remove the bolt assembly (9) from the upper actuator connection.
(c)
Hold the upper actuator.
(d)
Remove the nut (23) at the connection of the lower actuator to the rudder.
(e)
Remove the bolts (29) (2 locations) and (31).
(f)
Hold the summing lever.
(g)
Remove the summing lever support (15).
(h)
Remove the bolt assembly (24) and the bushing (21).
(i)
Hold the lower actuator.
S 864-018
(2)
Turn the lower rudder (11) with your hand to the fully left
position.
S 494-019
(3)
Attach the sling assembly to the lift points on the left side of the lower rudder (Fig. 401).
(4)
Attach the sling assembly to the crane.
S 494-020
NOTE: We recommend that you use a load positioner (also called a
____ Zero G device) to let you manually move the lower rudder.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-21-01
ALL ú ú 01 Page 405 ú Feb 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
SEE E TRANSMITTER FOR THE LOWER RUDDER POSITION
LOWER RUDDER SEE A RUDDER THE LOWER PACKAGE FOR POWER CONTROL SEE C ACTUATOR UPPER SEE F SEE B HINGE NO. 4 SEE G HINGE NO. 3 HINGE NO. 2
SEE D ACTUATOR LOWER HINGE NO. 1 SEE B
RUDDER FRONT SPAR LOWER RUDDER
A
BOLT A 6. LOCKWASHER 2. WASHER 1. BOLT
NUT A BONDING JUMPER 2. WASHER BUSHING 5. SLEEVE 4. FLANGED BUSHING
B HINGES NO. 1 AND 4 3. NUT BONDING JUMPER A-A
Lower Rudder Power Control Package and Position Transmitter Figure 402 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-21-01
ALL ú ú 01 Page 406 ú Jun 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
9.
BOLT ASSEMBLY
10.
ANTIROTATION STOP
11.
LOWER RUDDER
12.
BUSHING
16. CAP SCREW
14. NUT 13. WASHER
15. SUMMING 17. WASHER
UPPER ACTUATOR CONNECTION LEVER
SUPPORT
C 31. BOLT 18. CAP
30. WASHER 19. HOUSING ASSEMBLY
20. ANTIROTATION STOP
29. BOLT (2)
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：747-400 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 2(66)
