C.
Procedure
S 864-002
(1)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6, Main Power Distribution Panel
1) 6J25, RUD/ELEV IND
2) 6J24, RUD/ELEV SENSOR
S 024-003
(2)
Loosen the card YM5A001.
(a)
Remove the card YM5A001 from the card file M8011.
TASK 27-28-02-404-004
3. Rudder/Elevator Surface Position Digitizer Installation (Fig. 401)_______________________________________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AIPC 27-09-00, Fig. 50
(3)
SSM 27-28-01, SSM 27-38-01
(4)
WDM 27-09-33, WDM 27-28-11, WDM 27-38-11
B.
Access
(1)
Location Zone 271 Passenger Cabin STA 2040 to STA 2360, E8 Aft Rack
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A
747-400
MAINTENANCE MANUAL
AFT SURFACE POSITION
DIGITIZER CARD FILE
B
Rudder/Elevator Surface Position Digitizer Installation
Figure 401
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A
747-400 MAINTENANCE MANUAL
C. Procedure
S 424-005
(1)
Install the card YM5A001 in the applicable slot of the card file M8011.
S 864-006
(2)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P6, Main Power Distribution Panel
1) 6J25, RUD/ELEV IND
2) 6J24, RUD/ELEV SENSOR
S 864-007
(3)
Supply electrical power (AMM 24-22-00/201).
S 714-009
(4)
Monitor the EICAS flight controls maintenance page.
(a)
Make sure that the 2 rudder position indications and the 4 elevator position indications show.
(5)
Remove the electrical power (AMM 24-22-00/201).
S 864-010
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A
747-400 MAINTENANCE MANUAL
RUDDER TRIM INDICATOR - REMOVAL/INSTALLATION
____________________________________________
1. General_______
A. There are two tasks in this subject. There is one task for the removal and one task for the installation of the rudder trim indicator. The procedure has these parts:
(1)
The removal of the rudder trim indicator
(2)
The installation of the replacement rudder trim indicator
(3)
The adjustment of the rudder trim indicator.
B.
The rudder trim indicator is in the aileron and rudder trim control module. The module is on the control stand.
TASK 27-28-03-004-001
2. Rudder Trim Indicator Removal (Fig. 401)_____________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 29-11-00/201, Main Hydraulic Supply System
(3)
SSM 27-21-01
(4)
WDM 27-28-13
B.
Access
(1)
Location Zone
221, 222 Control Cabin
C.
Procedure
S 864-011
(1) Supply electrical power (AMM 24-22-00/201).
S 864-014
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
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