AIRPLANES WITH LATCH OPEN SWITCH
Cargo Door Sequence Switches Figure 401 (Sheet 6)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
52-34-09
ALL ú ú 02 Page 407 ú Feb 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 934-012
(3)
Identify the wires with a label for installation.
S 024-004
(4)
Remove the switch mounting nuts.
S 024-010
(5)
Remove the switch from the switch bracket.
TASK 52-34-09-404-005
3. Sequence Switches - Installation
________________________________
A. References
(1)
52-34-00/501, Forward/Aft Cargo Door
(2)
IPC 52-34-09
(3)
SSM 52-34-01, 52-35-01
(4)
WDM 52-34-11, 52-35-11
B.
Access
(1)
Location Zone
122 Forward Cargo Container, Forward Half
142 Aft Cargo Container Compartment
(2)
Access Panel
821R Door - Forward Cargo Compartment
822R Door - Aft Cargo Compartment
C.
Procedure
S 424-006
(1)
Put the sequence switch in its position in the switch bracket (Fig. 401).
S 024-011
(2)
Install the switch mounting nuts.
S 434-007
(3)
Connect the wires.
(4)
Adjust the switch (Ref 52-34-00/501).
S 864-009
(5)
Remove the DO-NOT-CLOSE tags and close these circuit breakers for the applicable cargo door:
(a)
P414 Power Distribution Center - Left 1) 414F15 CARGO DOOR CONTROL FWD 2) 414F16 CARGO DOOR CONTROL AFT
S 824-008
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
52-34-09
ALL ú ú 01 Page 408 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
CARGO DOOR SEQUENCE SWITCHES - INSPECTION/CHECK
_______________________________________________
1. General_______
A. This procedure contains a task to do a functional check of the forward/aft cargo door system electrical components and circuitry.
TASK 52-34-09-726-004
2. Do a Functional Check of the Forward/Aft Cargo Door System Electrical_____________________________________________________________________ Components and Circuitry (Fig. 601)________________________
A. Standard Tools and Equipment
(1)
Multimeter - to measure electrical continuity
B.
References
(1)
52-34-00/001, Forward/Aft Cargo Door
C.
Access
(1)
Location Zone 122 Forward Cargo Container Compartment, Forward Half 142 Aft Cargo Container Compartment
(2)
Access Panel
821R Door - Forward Cargo Compartment
822R Door - Aft Cargo Compartment
D.
Procedure
S 866-005
(1)
Make sure the cargo door is in the closed and latched position.
S 866-001
(2)
Open circuit breakers as follows for the applicable cargo door.
(a)
P59 Aft Equipment Panel
1) AFT CARGO DOOR POWER UNITS
(b)
P414 Power Distribution Center - Left 1) 414A21 LOWER CARGO DOOR FORWARD 2) 414F15 CARGO DOOR CONTROL FORWARD 3) 414F16 CARGO DOOR CONTROL AFT
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
52-34-09
ALL ú ú 01 Page 601 ú Jun 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
DOOR UP
SWITCH
