* SEE THE WDM EQUIPMENT LIST
Indication - Component Index
Figure 101 (Sheet 2)
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A
747-400 FAULT ISOLATION/MAINT MANUAL
PANEL, M7321 ANTI-ICE P180 PANEL
SEE A
P6 PANEL
MAIN EQUIPMENT CENTER
FLIGHT COMPARTMENT
ENGINE 2 NACELLE
YMES002 ANTI-ICE SWITCH, NACELLE ANTI-ICE ENGINE 3 NACELLE
2 3 ANTI-ICE SWITCH,
ENGINE 1 NACELLE 1 ON ON 4 YMES003
ANTI-ICE SWITCH, w w
YMES001 ON w VALVE a VALVE a ON w
VALVE VALVE
a a
ON ENGINE 4 NACELLE
w
ANTI-ICE SWITCH,
VALVE a YMES004
WING ANTI-ICE
ANTI-ICE PANEL, M7321
A
AIR CONDITIONING BAY
DOOR, 191NL OR 192JR
SEE C SHT 2
BLEED AIR PRESSURE SENSOR AND BLEED AIR OVERPRESSURE SWITCH
SEE B SHT 2
Indication - Component Location Figure 102 (Sheet 1)
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747-400
FAULT ISOLATION/MAINT MANUAL
BLEED AIR
OVERPRESSURE SWITCH, BLEED AIR
S1591 (ENGINE 2), S1592 (ENGINE 3) X846 (ENGINE 1), PRESSURE SENSOR, HOLES DRAIN
X995 (ENGINE 4)
DRAIN HOLES
BLEED AIR BLEED AIR
PRESSURE SENSOR, OVERPRESSURE SWITCH,
X847 (ENGINE 2),
S1590 (ENGINE 1), X994 (ENGINE 3) FWD S1593 (ENGINE 4) FWD
ENGINE 3 BLEED AIR PRESSURE SENSOR ENGINE 4 BLEED AIR PRESSURE SENSOR AND BLEED AIR OVERPRESSURE SWITCH AND BLEED AIR OVERPRESSURE SWITCH (ENGINE 2 IS OPPOSITE) (ENGINE 1 IS OPPOSITE)
B FROM SHT 1 B FROM SHT 1
LEFT, RIGHT
DUCT PRESSURE
TRANSMITTER,
X1017, X1016
SEE D DUCT PRESSURE TRANSMITTER, X1017 (LEFT), X1016 (RIGHT)
FWD
C FROM SHT 1 AIR CONDITIONING BAY D (LEFT DUCT PRESSURE TRANSMITTER IS OPPOSITE) RIGHT DUCT PRESSURE TRANSMITTER
Indication - Component Location
Figure 102 (Sheet 2)
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L98672
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747-400 FAULT ISOLATION/MAINT MANUAL
Indication - Component Location
Figure 102 (Sheet 3)
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BLEED AIR FLOW SENSOR, B7020 (ENGINE 1), B7023 (ENGINE 4)
SEE F
BLEED AIR FLOW SENSOR
ELECTRICAL CONNECTOR
PNEUMATIC
DUCT
BLEED AIR FLOW SENSOR
B7020 (ENGINE 1), B7021 (ENGINE 2),
B7022 (ENGINE 3), B7023 (ENGINE 4)
F
BLEED AIR FLOW SENSOR, B7021 (ENGINE 2), B7022 (ENGINE 3)
SEE F BLEED AIR FLOW SIGNAL CONDITIONER MODULE, B7019
SEE G
MAIN EQUIPMENT CENTER
117AL
BLEED AIR FLOW SIGNAL CONDITIONER MODULE, B7019 (E1-5) FWD
G
Indication - Component Location
Figure 102 (Sheet 4)
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