(2)
AMM 20-11-14/701, Metal Surfaces

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (3)  
WDM 20-20-00, Electrical Bonding and Grounding in the Standard Wiring Practice manual D6-54446

 (4)  
AMM 24-22-00/201, Manual Control

 (5)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (6)  
AMM 31-61-00/201, Integrated Display System

 (7)  
WDM 27-21-11

 F.
Access

 (1)  
Location Zone
 324 Vertical Stabilizer, Rear Spar to Trailing Edge

 (2)  
Access Panel
 324FL Inspection Access Panel
 324FR Centering Mechanism Access Panel

 G.
Install the Rudder Trim Actuator

 S 224-011
 (1)  
Examine the actuator connection points for worn parts.

 S 424-012

 (2)  
Install the rudder trim actuator (2).

 (a)  
Align the rudder trim actuator (2) with the airplane structure and the feel, centering, and trim mechanism (5).

 (b)  
Install the bolt assembly (15), washer (16), large nut (17), washer (18), and small nut (19) at the feel, centering, and trim mechanism.

 (c)  
Install the bolt assembly (10), bushing (11), large nut (12), washer (13), and small nut (14) at the top connection hole.

 (d)  
Tighten the large nuts for the two bolt assemblies.

 (e)  
Tighten the small nuts for the two bolt assemblies.

 NOTE: Do not turn the large nuts when you do this step.
____
 S 434-013
 (3)  
Install the bonding jumper (4).

 (a)  
Clean the mating surfaces (AMM 20-11-14/701).

 (b)  
Use a bonding meter to make sure the surface resistance is less than 0.003 ohms (Ref WDM 20-20-00 in the Standard Wiring Practice Manual).

 (c)  
Install the bolt (6), washer (9), washer (7), bonding jumper (4), washer (9), and nut (8).

 (d)  
Apply sealant at the bonding jumper ends.

 (4)
Connect the electrical connector, DM7878, to the trim actuator.

 (5)  
Remove rig pin R-4.

 S 434-014
 S 094-015
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 27-21-10
 ALL  ú ú 01 Page 405 ú Jun 18/99
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A
747-400
MAINTENANCE MANUAL

 S 864-027
 (6)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (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 864-028
 (7)  
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 NORM position.

 H.
Rudder Trim Actuator Test

 S 034-016
 (1)  
Disconnect the steering rod for the nose gear from the rudder forward quadrant.

 S 864-018

 (2)  
Make sure the EICAS operates (AMM 31-61-00/201).

 S 864-038
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
　
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