C14212
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 ALL  ú ú 02 Page 5 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 52-31-00
 ALL  ú ú 02 Page 6 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
DOOR PUSHED
D3706
115/200V.A

C1572 D3707
T1 L1 2
102 20
AC 400HZ

3. 3.
MAIN DECK

T2 L2
.B 6 20
10 4 10 REVERSINGT3 L3 CONTACTS
GROUND .C C1631
10 6
10 20
HANDLING T19 (P15)

TP-2 TP-3 UNLATCH LATCH
NOSE CARGOLATCHES
3. 3. 3.3. DOOR (P15) S
BUS 24-23-31
1
5-8 LEFT
LATCH 16 B
1 1 11
DC 7 Y1 UNLATCH & LATCH OPEN INTERLOCK CKT28V DC MAIN 15
C SHT 2
DECK CARGO 20 8

C1407  X1 X36 LATCH 8L X37 LATCH 7LX38 LATCH 6LX39 LATCH 5L
TP-1 REVERSING LATCH CLOSED INTERLOCK CKT
TP-11 TB325
HANDLING BUS RELAY R759 20 D
NOSE CARGO
G4
DOOR (P15)

D6139D3708 3 20 20 10
3. 3.
7 20
52-71-02

C1632
DH45052-71-02
5
11 20
DH450

2
LATCHES
52-71-0214 DR761
S
REVERSING RELAYS DX52
3.3. 3. 3.
22

4NC DR761 1-4 LEFT
C3 MOTOR & BRAKE
R756 R757
4C5 20 12
C2
21 A
1111
C1
(S1)

DC TEST
A3PUSH PULL
A2
X43 LATCH 1L X42 LATCH 2L X41 LATCH 3L X40 LATCH 4LA1
REF: 52-71-02 9 20 13 15
B AC
X1
H450 (YK2) MODULE-NOSE
C
CARGO DOOR ANNUNCIATOR (P4)
D3  X1
20  8 X2 7 20 14
D2X2
THERMALTP-12
TP-4
4 20 R761 PROTECTION
3. 3. INDICATION
D6140 X1 820
D8708 20 9
8D2
C1633
D3
1710 16
7 12 20 10
LATCHES
X2 158 14
9 3. 3. 3. 3.
1-4 RIGHT
9
OPEN
OUT
1111
OPEN
DOOR
52-71-02
TP-14
CONTROL
DR762
12
DR762
X44 LATCH 1R X45 LATCH 2R X46 LATCH 3RX47 LATCH 4R
B3 131 6
B2
CLOSE
3
11
2
20  2
B1
122 4
2
CLOSE
1
D3
DOOR PULLED
3
D2
TP-8
IN
D1
TP-15
TP-13
CLOSE
A3S1161
PUSH-PULL CAM
A2
10
DOOR DOWN DOOR PUSHED OUT
G1
G3
G2
TB325

LATCHES OPEN INDICATION
5 20
3. 3.
9 20 C1634 13 20 LATCHES
5-8 RIGHT 3. 3. 3.
111
X50 LATCH 7R X49 LATCH 6RX48 LATCH 5R
S
C1629 12
20  3
A1
ACTUATOR
11
3.
4
20  4
X1
REVERSING RELAY
TP-16
52-71-02
3
R758
1
PULL-UP CAM
X2
3
2
5
5
D6137
S
DX53A
R762 ON
7
REVERSING
MOTOR & BRAKE
M1212
CONTROL
1 12 1
CONTACTS
A
4
TP-17
OFF
D6139
C1630
5
DX51 4
5
5
DOOR LIFT
DX53A
6 5
R758
4122 4
1
M1213
MOTOR & BRAKE
S1162
D6137
B
AC
8
SYS PWR L1152
C
A
TP-18 AC
DC
POWER ON D6139 RAISE
2 12 3
3
C
LOWER
4
112011
THERMAL
M1214
PROTECTION
2 7
DX53B
6206
TP-6
Y1
2012
M1215
36
X1
L1154
11 DX53B
S1160 DOOR TP-7
B
2
THERMAL SHT 2 PROTECTION
L1151
1810 9 19
LAMP TEST FULL DOOR
CLOSE
DOOR DN
CLOSED
FULL
A
6
720 7
LATCH NOT CLOSEDD3707
OPEN 222 121 171 20
18
REF: 52-71-02

DC
TP-9 TP-10 234 3 SHT 2 16
13 LATCH CLOSED
DOOR UP DC LATCH CLOSED
INTERLOCK-CKTH121 MODULE-NOSE DOOR & LIGHT CONTROL
　
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