(2)
AIPC 21-26-08, Fig. 1
(3)
WDM 21-27-22
(4)
SSM 21-27-02
B. Access
(1) Location Zone
145 Bulk Cargo Compartment, LH
C. Remove the Bulk Cargo Fan Screen
S 862-002
(1)
Make sure that the AFT CARGO HT switch on the P5 overhead panel is set to off.
S 862-003
(2)
Open the circuit breaker on the Power distribution center-right, P415:
(a) 415H38, BULK CARGO VENT FAN PWR
S 012-005
(3)
Remove the sidewall lining from the area immediately forward of the flapper valve screen in the aft left corner of the bulk cargo compartment (AMM 25-55-02/401).
S 032-009
(4)
Remove the clamp holding the bulk cargo fan screen.
D. Clean the Bulk Cargo Fan Screen
S 142-031
(1)
Use a cloth with clean water to rinse the screen and the inside of the check valve.
S 142-032
(2)
Use a cloth or compressed air to dry the screen and the inside of check valve.
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A
747-400
MAINTENANCE MANUAL
SEE A
(REF) FAN BULK CARGO
FAN SCREEN BULK CARGO CLAMP BULK CARGO FAN SCREEN
FWD
A
Bulk Cargo Fan Screen Cleaning
Figure 201
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H77371
A
747-400 MAINTENANCE MANUAL
E. Install the Bulk Cargo Fan Screen
S 432-017
(1)
Install the fan screen on the end of the fan.
S 432-019
(2)
Install the clamp on the fan screen.
S 862-022
(3)
Close the circuit breaker on the Power Distribution panel center-right, P415:
(a) 415H38, BULK CARGO VENT FAN PWR
S 862-023
(4)
Apply electrical power (AMM 24-22-00/201).
S 412-028
(5)
Install the sidewall lining (AMM 25-55-02/401).
(6)
Remove electrical power (AMM 24-22-00/201).
S 862-030
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
BULK CARGO FAN - REMOVAL/INSTALLATION
_____________________________________
1. General_______
A. To get access to the bulk cargo fan you must remove the sidewall lining from the left side of the bulk cargo compartment.
TASK 21-26-08-004-042
2. Bulk Cargo Fan Removal (Fig. 401)______________________
A. References
(1)
AMM 25-55-02/401, Bulk Compartment Ceiling and Sidewall Lining
(2)
IPC 21-40-51 Fig. 1
(3)
WDM 21-27-22
(4)
SSM 21-27-03
B. Access
(1) Location Zone
145 Bulk Cargo Compartment, LH
C. Prepare for the Removal
S 864-031
(1)
Make sure that the AFT CARGO VENT switch on the P59 panel just forward of the cargo door is set to OFF.
S 864-032
(2)
Open these circuit breakers and attach DO-NOT-CLOSE identifiers:
(a)
Right Power Distribution Center, P415 1) 415H38, VENT FAN PWR BULK CARGO
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