RUDDER TRIM ACTUATOR
SEE A
INPUT ROD TO
THE UPPER RUDDER
RATIO CHANGER
3. ELECTRICAL CONNECTOR
2. RUDDER TRIM BONDING JUMPER
ACTUATOR A SEE B
RIG PIN R-4
A
1. AFT QUADRANT
5.
RUDDER FEEL, CENTERING, AND TRIM MECHANISM
6.
BOLT
7.
WASHER
9. WASHER B
B
9. WASHER
8. NUT
4. BONDING JUMPER
BONDING JUMPER RUDDER TRIM ACTUATOR
B A
10. BOLT
15.
BOLT
16.
WASHER
2. RUDDER TRIM ACTUATOR
2. RUDDER TRIM ACTUATOR
17. LARGE NUT
11.
BUSHING
12.
LARGE NUT
18. WASHER
13.
WASHER
14.
SMALL NUT
19. SMALL NUT
A-A B-B
Rudder Trim Actuator Installation
Figure 401
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-21-10
ALL ú ú 01 Page 402 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 864-037
(4)
Remove the power from hydraulic systems No. 1 and 2
(AMM 29-11-00/201).
S 864-004
(5)
Find the switches for the FLT CONTROL HYD POWER on the Pilot's Overhead Maintenance Panel, P461.
(a)
Put all the TAIL switches in the SHUTOFF position.
S 864-006
(6)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6, Main Power Distribution Panel
1) 6J19, RUDDER TRIM IND
(b)
P7, Overhead Circuit Breaker Panel
1) 7D16, RUD TRIM CONT
(c)
P180, DC Power Distribution Panel
1) 180E7, ELEV/RUD VLV SYS 2
2) 180E22, ELEV/RUD VLV SYS 4
3) 180H8, ELEV/RUD VLV SYS 1
4) 180H23, ELEV/RUD VLV SYS 3
S 014-007
(7)
Remove the access panel 324FR or 324FL (AMM 06-09-07/201).
S 494-008
(8)
Install rig pin R-4 in the feel, centering, and trim mechanism.
E.
Remove the Rudder Trim Actuator
S 034-033
(1)
Disconnect the electrical connector, DM7878, from the rudder trim actuator.
S 034-034
(2)
Remove these components:
(a)
The bonding jumper (4) at the rudder trim actuator (2).
(b)
The bolt (15) that connects the trim actuator to the feel, centering, and trim mechanism.
(c)
The bolt (10) that connects the actuator to the airplane structure.
(3)
Remove the rudder trim actuator (2).
S 024-035
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-21-10
ALL ú ú 01 Page 403 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
TASK 27-21-10-404-010
3. Rudder Trim Actuator Installation (Fig. 401)____________________________________________
A. Special Tools and Equipment
(1)
G12001-50 Rig Pin Kit
B.
Standard Tools and Equipment
(1)
Bonding Meter (WDM 20-20-00)
C.
Consumable Materials
(1)
A00247 Sealant - BMS 5-95
D. Parts ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 2 | Actuator-Rudder Trim | 27-21-11 | 5 | 400 | | | 6 | Bolt | | | 5 | | | 7 | Washer | | | 15 | | | 8 | Nut | | | 20 | | | 9 | Washer | | | 10 | | | 10 | Bolt | | | 365 | | | 11 | Bushing | | | 395 | | | 12 | Nut | | | 385 | | | 13 | Washer | | | 375 | | | 14 | Nut | | | 390 | | | 15 | Bolt | | | 370 | | | 16 | Washer | | | 380 | | | 17 | Nut | | | 387 | | | 18 | Washer | | | 377 | | | 19 | Nut | | | 392 | | | | | | | | 2......…........…...................................…...........….....…........1
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