(h)
For the lower RRC, Hold the RRC (16) and remove the bolts (38, 39, and 42) that connect the ratio changer to the structure.
(i)
Remove the upper (9), or lower (16) RRC.
(j)
Do this step if the new RRC does not have an output control rod: 1) Remove the output control rod (7) from the RRC you removed
and connect it to the new RRC.
TASK 27-21-12-402-009
3. Rudder Ratio Changer (RRC) Installation (Fig. 201)_______________________________________
A. Special Tools and Equipment
(1) G12001-50, Rig Pin Kit
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
8. INPUT CONTROL ROD
16. LOWER RUDDER RATIO CHANGER
SEE C
A
747-400
MAINTENANCE MANUAL
UPPER POWER
CONTROL PACKAGE
SEE A
LOWER POWER
CONTROL PACKAGE
SEE B
1. UPPER POWER CONTROL
9. UPPER RUDDER
PACKAGE RATIO CHANGER
2. SUMMING SEE C LEVER
7. OUTPUT 3. BOLTCONTROL
8. INPUT CONTROL ROD 4. WASHER
ROD
5.
WASHER
6.
NUT
UPPER POWER CONTROL PACKAGE
A
10.
LOWER POWER CONTROL PACKAGE
11.
SUMMING LEVER
12.
BOLT
13.
WASHER
7. OUTPUT CONTROL ROD
14.
WASHER
15.
NUT
LOWER POWER CONTROL PACKAGE
B
Rudder Ratio Changer Installation
Figure 201 (Sheet 1)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
17.
WASHER
18.
NUT
23. TRUNNION CRANK
A
24. SHEAR
PIN22. RATIO 19. BOLT CHANGER 20. WASHER SERVO 21. NUT
RATIO CHANGER TRUNNION 7. OUTPUT SEE D CONTROL ROD
7.
OUTPUT
8.
INPUT CONTROL ROD
CONTROL ROD
A
RATIO CHANGER TRUNNION RUDDER RATIO CHANGER
D
C
25. BOLT (RIGHT) 38. BOLT (RIGHT)
26. BOLT (LEFT) 39. BOLT (LEFT)
27. BONDING 40. BONDING
JUMPER 28. SCREW JUMPER 28. SCREW
29. WIRE 29. WIRE
BUNDLE BUNDLE
CLAMP CLAMP
30. BOLT
30.
BOLT
31.
WASHER
31.
WASHER
32.
NUT
32.
NUT
33.
ELECTRICAL
41. ELECTRICAL CONNECTOR
CONNECTOR
VERTICAL FIN
37. WASHER
7. OUTPUT CONTROL
7. OUTPUT CONTROL
37. WASHER RODROD
34. BOLT (RIGHT) 42. BOLT
35.
BOLT (LEFT) 36. NUT
36.
NUT
A-A A-A
(UPPER RUDDER (LOWER RUDDER
RATIO CHANGER) RATIO CHANGER)
Rudder Ratio Changer Installation
Figure 201 (Sheet 2)
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A
747-400
MAINTENANCE MANUAL
(2)
Milliohmmeter - 0 to 0.1 ohm range.
B.
Consumable Materials
(1)
A00247, Sealant - BMS 5-95
C. Parts ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 201 | 3 | Bolt Assembly | 27-21-15 | 02 | 35 | | | 3 | Bolt Assembly | | | 95 | | | 4 | Washer | | | 40 | | | 4 | Washer | | | 100 | | | 5 | Washer | | | 45 | | | 5 | Washer | | | 105 | | | 6 | Nut | | | 50 | | | 6 | Nut | | | 110 | | | 9 | Rudder Ratio Changer, Upper | 27-21-12 | 03 | 1 | | | 12 | Bolt Assembly | 27-21-16 | 02 | 30 | | | 13 | Washer | | | 35 | | | 14 | Washer | | | 40 | | | 15 | Nut | | | 45 | | | 16 | Rudder Ratio Changer, Lower | 27-21-12 | 03 | 5 | | | 17 | Washer | 27-21-15 | 02 | 915 | | | 18 | Nut | | | 930 | | | 19 | Bolt | 27-21-52 | 01 | 5 | | | 20 | Washer | | | 20 | | | 21 | Nut | | | 25 | | | 24 | Pin - Shear | 27-21-12 | 03 | 115 | | | 25 | Bolt | 27-21-15 | 02 | 895 | | | 26 | Bolt | | | 910 | | | 29 | Clamp | 27-21-12 | 03 | 405 | | | 29 | Clamp | | | 455 | | | 30 | Bolt | 27-21-15 | 02 | 5 | | | 31 | Washer | | | 10 | | | 32 | Nut | | | 25 | | | 34 | Bolt | | | 900 | | | 35 | Bolt | | | 905 | | | 36 | Nut | | | 925 | | | 37 | Washer | | | 930 | | | 38 | Bolt | 27-21-16 | 02 | 560 | | | 39 | Bolt | | | 565 | | | 42 | Bolt | | | 530 | | | | | | | | 2......…........…...................................…...........….....…........1
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