NOTE: NOSE CARGO DOOR IS
CLOSED OPEN
3 PHASE ABC ROTATION RAISES DOOR (CCW ROTATION OF OUT SHAFT)
SHOWN IN THE FULLY
CLOSE OPEN
CLOSED POSITION. 4 PHASE ABC ROTATION EXTENDS THE LATCH ACTUATOR (LATCHES DOOR)
OFF
LAMP
DOOR
SYSTEM PWR
5 THREE POSITION SWITCH SPRING LOADED TO NEUTRAL. MOMENTARY MOVEMENT TO ON CLOSES SWITCH CONTACTS 1 AND 2. CONTACTS WILLREMAIN CLOSED UNTIL SWITCH IS MOVED TO OFF OR POWER IS REMOVED.
TEST CONTROL
Nose Cargo Door Schematic
Figure 2 (Sheet 1)
B26804B26807
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
52-31-00
ALL ú ú 02 Page 7 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
52-71-02DC
DR1104
SHT 1
A3 A2 A B A1
DC
B3
D6141 D6141B2
4
6
C B1
SHT 1 DX36 DX36DX37 DX37
DX38 DX38
DX39DX39DX40 DX40 DX41 DX41DX42 DX42
DX43DX4311
11
11
11 11 11 11 11
A1 A2
7
DC 10 7 10 7
10 7
10 7 10 7 10 7 10 7 10
7 D3 SHT 1
LATCH LATCH
LATCH
LATCH LATCH LATCH
LATCH
LATCH D
D2 5 D1 OPEN OPEN
OPEN
OPEN OPEN OPEN OPEN OPENDC A4 A3 X2 X36 LATCH 8L X37 LATCH 7L
X38 LATCH 6L
X39 LATCH 5L X40 LATCH 4L X41 LATCH 3LX42 LATCH 2L X43 LATCH 1LX1 13 14151617 18
R1104
ISOLATION
D6141
19
20
DS110 DS110
14 131211
14 131211
B
C
A 10 10
15 S1456 9 15 S1456 9
LATCH SELECT
LATCH SELECT
DC
16 16 8 8 17
17 26 P C C
DECK A
DECK B
7 | 1 IN.
26 35
354 4
H O MIN
2
11 IN.
21
MAX
S110 PRESSURE LATCH OPEN
DX44 DX44
10 E8 B1 B27 11 LATCH OPEN 27 2625
242322
INTERLOCK
B4 B3
D6141
CKT SW 1
S1458
LATCH OPEN
LATCH LATCH
LATCH
LATCH LATCH LATCH
LATCH TEST SWITCH
D6141 OPEN OPEN
OPEN
OPEN OPEN OPEN OPEN
6 1010
10
10 1010
10SEE X51
97 7
77
7 7 7
DC 11
11
11
11 11 11 11
SH 1 DX51 DX51
DX50 DX50
DX49 DX49
DX48 DX48DX47 DX47DX46DX46DX45DX45
52-31-01 L2840 LATCH OPEN
X51 LATCH 8R X50 LATCH 7R
X49 LATCH 6R
X48 LATCH 5R X47 LATCH 4R X46 LATCH 3RX45 LATCH 2RX44 LATCH 1R A1 A2
A4 A3 B1
B2
A
B4 B3
S1457
LAMP TEST
DX36 DX36
DX37 DX37
DX38DX38
DX39DX39DX40 DX40 DX41 DX41DX42 DX42
DX43DX4317
17
17
17 17 17 17
17 A1 A210
13 1613 16
13 16
13 1613 1613 1613 1613 16LATCH LATCH
LATCH
LATCHLATCH LATCHLATCH LATCHCLOSED CLOSED
CLOSED
CLOSED CLOSED CLOSED CLOSED CLOSEDA4 A3 X36 LATCH 8L X37 LATCH 7L
X38 LATCH 6L
X39 LATCH 5L X40 LATCH 4L X41 LATCH 3LX42 LATCH 2L X43 LATCH 1L29 3031323334
D6141
35 36 14 131211
14 131211 15 S1456 9
10 10
15 S1456 9 LATCH SELECT
LATCH SELECT 8 16 16
8 17
17 26 35
C
C 26
DECK C DECK D
354 4 37
LATCH CLOSED
DX44 DX44
1316 17 43 4241
403938 D6141 LATCH LATCH
LATCH
LATCHLATCH LATCHLATCHD6141 CLOSED CLOSED
CLOSED
CLOSED CLOSED CLOSED CLOSED
6 F B2B1 11 121613 13
1613
13 1613 1316
16
16 16 13
DC 17 SEE X51 17
17
17 17 17 17
SH 1 LATCH
B4 B3 DX51 DX51 DX50 DX50
DX49 DX49
DX48 DX48DX47 DX47DX46DX46DX45DX45
52-31-01 CLOSED
S1459
LATCH X51 LATCH 8R X50 LATCH 7R
X49 LATCH 6R
X48 LATCH 5R X47 LATCH 4R X46 LATCH 3RX45 LATCH 2RX44 LATCH 1R INTERLOCK
CLOSED
TEST SW
CKT SW 1
1 DC
L2841 2
S
LATCH ACTUATOR TEST LATCH CLOSED
LATCH CLOSED LATCH OPEN M482 MODULE-LATCH ACTUATOR TEST LATCH SELECT 8L 8R 7L 7R
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