(2)  
Flow control and shutoff valve filter cleaning.

 (3)  
Flow control and shutoff valve filter installation.

 TASK 21-51-13-004-001
 2.  Flow Control and Shutoff Valve Filter Removal (Fig. 401)
_____________________________________________
 A.  References
 (1)  
06-09-03/201, Body Section 44 Access Doors and Panels

 (2)  
36-00-00/201, Pneumatic System

 (3)  
IPC 21-51-01 Fig. 1

 B.  Access
 (1)  
Location Zone
 133 Air Conditioning Equipment Bay, LH
 134 Air Conditioning Equipment Bay, RH

 (2)  
Access Panel
 191N-L Air Conditioning Access Door
 191H-L Air Conditioning Access Door
 192H-R Air Conditioning Access Door

 C.  Prepare for the Removal
 S 864-003
 (1)
Release the pressure in the pneumatic system (Ref 36-00-00/201).

 S 014-004

 (2)  
Open the applicable access doors (Ref 06-09-03/201):

 -191N-L for pack 1
 -191H-L for pack 2
 -192H-R for pack 3
 D.  Remove the Filter
 S 034-005
 WARNING: KEEP YOUR FACE AWAY FROM THE FLOW CONTROL AND SHUTOFF VALVE
_______ WHEN YOU REMOVE THE COMPONENTS FROM THE VALVE. A SUDDEN RELEASE OF THE PRESSURE IN THE FLOW CONTROL AND SHUTOFF VALVE CAUSE INJURY TO PERSONS.
 (1)  Cut and remove the lockwires from the plugs on the flow control and shutoff valve (2 locations).
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A
747-400
MAINTENANCE MANUAL

PACK 2 FLOW CONTROL PACK 1 FLOW CONTROL AND SHUTOFF VALVE AND SHUTOFF VALVE
SEE A SEE A
PACK 3 
FLOW CONTROL 
FWD  AND SHUTOFF VALVE 
PLUG  AIR CONDITIONING  SEE  A 
AND SPRING  EQUIPMENT BAY 
FILTER 

PLUG SPRING ANDFLOW CONTROL FILTERAND SHUTOFF VALVE
A
Flow Control and Shutoff Valve Filter Installation
Figure 401

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 034-013
 (2)  
Remove the plugs and the springs from the valve.

 S 024-014

 (3)  
Remove the filters from the valve.

 TASK 21-51-13-104-023
 3.  Flow Control and Shutoff Valve Filter Cleaning______________________________________________
 A. Consumable Materials
 (1)  B01053, Mild Alkaline Cleaner, FO2085M
 B. References
 (1)  AMM 21-51-13/401, Flow Control Valve and Shutoff Valve
 C. Clean the Filter
 S 024-017
 (1)  Remove the filters (AMM 21-51-13/401).
 S 134-018
 WARNING:_______USE GOGGLES AND RUBBER GLOVES WHEN YOU WASH THE FILTER. WASH THE FILTER IN A WELL VENTILATED AREA. THE CLEANER CAN IRRITATE YOUR EYES, SKIN, THROAT AND LUNGS.
 (2)  Wash the filters in an ultrasonic bath with the cleaner, FO2085M, or equivalent.
 S 164-019
 WARNING: USE AIR PRESSURE OF 25 PSIG OR LESS TO CLEAN AND DRY THE
_______ FILTER. DO NOT POINT THE AIRFLOW TOWARD YOURSELF OR OTHER PERSONS. YOU CAN BE INJURED BY FLYING PARTICLES.
 (3)  Blow dry, filtered, compressed air through the filters to remove any contamination.
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 ALL  ú ú 02 Page 403 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 164-020
 (4)  
　
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