B.
Access
(1)
Location Zone
261 Main Deck STA 1720 To 2040, LH
(2)
Access Panel
836L Door - Main Deck Cargo
C.
Procedure
S 864-077
(1)
Open these circuit breakers for the applicable EICAS system:
(a)
P7 Overhead Circuit Breaker Panel
1) 7F8 UPR EICAS
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A
747-400
MAINTENANCE MANUAL
SIDE CARGO DOOR
SEE A SWITCH WARNING DOOR
SEE B
DOOR CLOSED SWITCH DOOR LATCHED
SEE E SWITCH
SEE D
SIDE CARGO DOOR A
Side Cargo Door Warning Switch InstallationFigure 404 (Sheet 1)
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A
747-400
MAINTENANCE MANUAL
DOOR WARNING SWITCH
MAKE SURE THE ACTUATOR DOES NOT TOUCH THE PLUNGER WHILE YOU SET THIS DIMENSION
Side Cargo Door Warning Switch Installation Figure 404 (Sheet 2)
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A
747-400
MAINTENANCE MANUAL
DOOR CLOSED SWITCH
1
MAKE SURE THE ACTUATOR DOES NOT TOUCH THE
E
PLUNGER WHILE YOU SET THIS DIMENSION
Side Cargo Door Warning Switch Installation
Figure 404 (Sheet 3)
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747-400 MAINTENANCE MANUAL
2) 7F9 EIU L
3) 7F10 EIU C
4) 7F14 LWR EICAS
5) 7F15 EIU R
S 024-019
(2)
Remove the warning switch for the side cargo door from the pressure relief door.
(a)
Get access to the inner part of the side cargo door.
(b)
Disconnect the electrical wire from the switch at the connector.
(c)
Remove the lockwire from the switch.
(d)
Remove the locknuts form the switch.
(e)
Remove the switch from the mounting bracket.
S 024-090
(3)
Remove the door latched switch.
(a)
Open the door to get access to the switch.
(b)
Disconnect the wiring from the switch.
(c)
Remove the lockwire from the switch.
(d)
Remove the locknuts from the switch.
(e)
Remove the switch.
S 024-091
(4)
Remove the door closed switch.
(a)
Open the door to get access to the switch.
(b)
Disconnect the wiring from the switch.
(c)
Remove the lockwire from the switch.
(d)
Remove the locknuts from the switch.
(e)
Remove the switch.
TASK 52-71-01-004-129
8. Upper Deck Crew Service Door Warning Switch Removal (Fig. 405)___________________________________________________
A. References
(1)
WDM 52-71-01
B.
Access
(1)
Location Zone
224 Fwd Upper Deck Passenger Cabin, RH
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