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A
747-400
MAINTENANCE MANUAL
SPOILER POSITION INDICATION ON AUXILIARY EICAS DISPLAY
SEE A
SPOILER NO. 4
REAR WING SPAR
POSITION SPOILER TRANSMITTER
SEE B
A
____NOTE: TRANSMITTER SIMILAR. MITTER SHOWN. NO. 12 SPOILER NO. 4 SPOILER POSITION TRANS-Figure 1 Spoiler Position Indicating System Component Location B
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747-400
MAINTENANCE MANUAL
AUXILIARY EICAS DISPLAY
12.3 #4 SPOILER #12 SPOILER 13.2
(2 PAGES SHOWN)
Spoiler Position Indicating System EICAS Displays Figure 2
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747-400
MAINTENANCE MANUAL
SPLR/ALRN IND
28V AC BUS 3 SPLR/ALRN SNSR
P6 MAIN POWER DISTRIBUTION PANEL
CX
T436 SPOILER 12
YMLA9 SURFACEPOSN XMTR
POSITION DIGITIZER
-FWD - SPLR/ALRN
M7603 ELECTRICAL
SYSTEMS CARD FILE
Spoiler Position Indicating System Schematic
Figure 3
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747-400 MAINTENANCE MANUAL
SPOILER POSITION INDICATING SYSTEM - ADJUSTMENT/TEST
____________________________________________________
1. General_______
A. There are two tasks in this procedure. There is one task for the operational test and one task for the adjustment of the spoiler position indicating system. The procedure has these parts:
(1)
The operational test of the spoiler position indicating system
(2)
The adjustment of the spoiler position transmitter.
TASK 27-68-00-715-001
2. Operational Test - Spoiler Position Indicating System_____________________________________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 29-11-00/201, Main Hydraulic Supply System
(3)
SSM 27-68-01
(4)
WDM 27-68-11
B.
Access
(1)
Location Zone
221 Control Cabin, LH
222 Control Cabin, RH
C.
Procedure
S 865-002
(1)
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).
S 865-004
(2)
Set all the FLT CONTROL HYD POWER WING switches on the P461 Pilots' Overhead Maintenance Panel to NORM.
S 865-005
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.
(3) Do this task: "Supply Hydraulic Power" (AMM 29-11-00/201).
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