S 012-003

 (2)  
Remove the left sidewall lining at station 540 of the forward cargo compartment (Ref 25-52-01/401).

 D. Remove the Cleaner
 S 032-004
 (1)  
Disconnect the purge tube from the cleaner.

 S 032-005

 (2)  
Remove the screws and the washers that hold the cleaner in the duct.

 S 022-006

 (3)  
Remove the cleaner.

 S 032-007

 (4)  
Put a cover on the duct openings.

 TASK 21-58-10-402-008
 4.  Equipment Cooling Air Cleaner Installation (Fig. 201)__________________________________________
 A. References
 (1)  
24-22-00/201, Manual Control

 (2)  
25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall Linings

 (3)  
IPC 21-58-10 Fig. 1

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MAINTENANCE MANUAL

 B. Access
 (1)  Location Zone
 121 Forward Cargo Compartment Forward Half, LH

 C. Install the Cleaner
 S 432-009
 (1)  Remove the covers from the duct openings.
 (a)  Make sure there is no unwanted material in the ducts.
 S 422-010
 (2)  
Put the cleaner in its position in the ducts.

 S 432-043

 (3)
Install the screws and the washers to hold the cleaner in the duct.

 S 432-011

 (4)  
Connect the purge tube to the cleaner with the rubber sleeve and the two clamps.

 D. Do the Installation Test for the Cleaner
 S 862-012
 (1)  
Make sure the EQUIP COOLING selector, on the overhead panel, P5, is in the NORM position.

 S 862-013

 (2)  
Supply electrical power (Ref 24-22-00/201).

 S 792-014

 (3)  
Feel for leaks around the cleaner.

 (a)  
Small leaks are permitted.

 (b)  
You must repair a large leak.

 E. Put the Airplane to Its Usual Condition
 S 412-015
 (1)  Install the left sidewall lining in the forward cargo compartment (Ref 25-52-01/401).
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 S 862-016
 (2)  Remove the electrical power, if it is not necessary (Ref 24-22-00/201).
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747-400 MAINTENANCE MANUAL
 EQUIPMENT COOLING INLET SCREEN - MAINTENANCE PRACTICES
______________________________________________________
 1.  General_______
 A.  This procedure has instructions to do the tasks that follow:
 (1)  
Remove the Equipment Cooling Inlet Screen

 (2)  
Install the Equipment Cooling Inlet Screen

 (3)  
Clean the Equipment Cooling Inlet Screen

 B.  The inlet screen for the equipment cooling system is installed at station 615 of the left sidewall of the forward cargo compartment, aft of the inboard supply valve and the supply fan.
 TASK 21-58-11-002-001
 2.  Remove the Equipment Cooling Inlet Screen (Fig. 201)_________________________________________
 A.  References
 (1)  
24-22-00/201, Manual Control

 (2)  
25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall Linings
　
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