S 864-053
(14) If the electrical power is not necessary, do this task: "Remove Electrical Power" (AMM 24-22-00/201).
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A
747-400
MAINTENANCE MANUAL
STABILIZER TRIM POSITION INDICATOR - REMOVAL/INSTALLATION
_________________________________________________________
1. General
_______
A. There are two tasks in this procedure. There is one task each for the removal and the installation of the stabilizer trim position indicator (which is referred to as the "position indicator". The procedure has these parts:
(1)
The removal of the position indicator
(2)
The installation of the replacement indicator
(3)
The operational test of the stabilizer trim indicating system.
B.
The removal and installation procedure is the same for the left or the right position indicator.
TASK 27-48-02-004-003
2. Stabilizer Trim Position Indicator Removal (Fig. 401)
__________________________________________
A. References
(1)
AIPC 27-48-02, Fig. 2
(2)
SSM 27-48-01
(3)
WDM 27-48-11
B.
Access
(1)
Location Zone
221, 222 Control Cabin
C.
Procedure
S 864-001
(1)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6, Main Power Distribution Panel
1) 6K23, STAB TRIM POSN IND L
2) 6K24, STAB TRIM POSN IND R
S 024-002
(2)
Remove the position indicator:
(a)
Remove four screws.
(b)
Lift the position indicator out of the mounting hole.
(c)
Disconnect the electrical connector DN312 (captain's) or DN311 (first officer's).
TASK 27-48-02-404-004
3. Stabilizer Trim Position Indicator Installation (Fig. 401)
_______________________________________________
A. References
(1)
AMM 27-48-00/501, Stabilizer Trim Indicating System
(2)
AIPC 27-48-02
(3)
SSM 27-48-01
(4)
WDM 27-48-11
B.
Access
(1)
Location Zone
221, 222 Control Cabin
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MAINTENANCE MANUAL
SEE A SEE B SCREW (4 PLACES)
STABILIZER TRIM POSITION INDICATOR
APL NOSE DN
0
S
2
T
4
A
B
6
T
8
R
10
I
M
12
O
A
APL
F
14
NOSE
15 UP
F
SCREW (4 PLACES)
B
Stabilizer Trim Position Indicator Installation Figure 401
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747-400 MAINTENANCE MANUAL
C. Procedure
S 024-005
(1)
Install the position indicator in the control stand:
(a)
Connect the electrical connector DN312 (captain's) or DN311 (first officer's) to the indicator.
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