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52-71-01
ALL ú ú 01 Page 402 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
C. Procedure
S 864-071
(1)
Open these circuit breakers for the applicable EICAS system:
(a)
P7 Overhead Circuit Breaker Panel 1) 7F8 UPR EICAS 2) 7F9 EIU L 3) 7F10 EIU C 4) 7F14 LWR EICAS 5) 7F15 EIU R
S 024-005
(2)
Remove the warning switch for the main electronic equipment door (Fig. 401).
(a)
Open the door.
(b)
Remove the lockwire from the two locknuts.
(c)
Remove the roller guide assembly and the locknut.
(d)
Remove the switch from the mounting bracket.
TASK 52-71-01-004-021
3. Center Electronic Equipment Door Warning Switch Removal (Fig. 401)._______________________________________________________
A. References
(1)
IPC 52-71-01 Fig. 1
(2)
SSM 52-71-01
(3)
WDM 52-71-14
B.
Access
(1)
Location Zone 118 Electrical and Electronics Compartment, RH
(2)
Access Panel
125B Door - Electronics Access
C.
Procedure
S 864-072
(1)
Open these circuit breakers for the applicable EICAS system:
(a)
P7 Overhead Circuit Breaker Panel 1) 7F8 UPR EICAS 2) 7F9 EIU L 3) 7F10 EIU C 4) 7F14 LWR EICAS 5) 7F15 EIU R
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
52-71-01
ALL ú ú 06 Page 403 ú Jun 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 024-006
(2)
Remove the warning switch for the center electronic equipment door (Fig. 401).
(a)
Open the door.
(b)
Disconnect the wiring from the switch at the splice.
(c)
Remove the two bolts that hold the mounting bracket to the latch keeper fitting.
(d)
Remove the switch.
TASK 52-71-01-004-024
4. Main Entry Door Warning Switches Removal (Fig. 402)
________________________________________
A. References
(1)
IPC 52-75-01 Fig. 2
(2)
SSM 52-71-01
(3)
WDM 52-71-13
B.
Access
(1)
Location Zone
211 Main Deck Portal to STA 488, LH
271 Main Deck STA 2040 T0 STA 2360, LH
(2)
Access Panel
831L Door - No. 1 Main Entry, LH
835L Door - No. 5 Main Entry, LH
C.
Procedure
S 864-075
(1)
Open these circuit breakers for the applicable EICAS system:
(a)
P7 Overhead Circuit Breaker Panel
1) 7F8 UPR EICAS
2) 7F9 EIU L
3) 7F10 EIU C
4) 7F14 LWR EICAS
5) 7F15 EIU R
S 024-027
(2)
Remove the warning switch for the main entry door (Fig. 402).
(a)
Open the entry door.
(b)
Remove the two countersunk screws that hold the cover to the switch.
(c)
Remove the two screws that hold the switch to the cam latch fitting.
(d)
Remove the two switch attach screws.
(e)
Remove the wires from the switch.
(f)
Put tags on the wires.
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