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747-400 MAINTENANCE MANUAL
 S 714-019
 (4)  Make sure the valve is open.
 NOTE: The manual override knob shows the position of the valve.
____
 S 794-020
 (5)  Feel for leaks around the valve.
 (a)  
Small leaks are permitted.

 (b)  
You must repair a large leak.

 G. Put the airplane to its usual condition.
 S 414-032
 (1)  
Close the applicable access door, 191H-L, 191N-L, 192N-R
 (AMM 06-09-03/201).

 S 864-021

 (2)  
Turn the applicable PACK selector, on the P5 panel, to the OFF position.

 S 864-031

 (3)  
Release the pressure in the pneumatic system, if it is not necessary (AMM 36-00-00/201).

 S 864-023

 (4)  
Remove the electrical power, if it is not necessary
 (AMM 24-22-00/201).

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747-400 MAINTENANCE MANUAL
 FLOW CONTROL AND SHUTOFF VALVE - ADJUSTMENT/TEST
________________________________________________
 1.  General
 A.  This procedure has instructions to do a functional test of the flow control and shutoff valves. A flow control and shutoff valve is installed at the aft end of each air cooling pack.
 TASK 21-51-01-705-001
 2.  Flow Control and Shutoff Valve Test (Fig. 501)___________________________________
 A.  Special Tools and Equipment
 (1)  
Valve Tester - GS9400-5 (Hamilton Standard, Windsor Locks, Conn.) Make sure the tester includes these parts:

 -GS8967-1, Cable Assembly
 -GS8967-9, Cable Assembly
 -AD30008-1, Hose Assembly
 -AD30008-3, Hose Assembly

 (2)  
Test Plugs - GS13237-1 and GS13238-1 (Hamilton Standard, Windsor Locks, Conn.)

 (3)  
Air or Nitrogen supply - 130 to 150 psi (900 to 1000 kPa) (commercially available)

 B.  References
 (1)  
AIPC 21-51-00, Fig. 5

 (2)  
AIPC 21-51-00 Fig. 5A

 (3)  
AIPC 21-51-00, Fig. 6

 (4)  
AIPC 21-51-00 Fig. 6A

 (5)  
AIPC 21-51-00, Fig. 7

 (6)  
AIPC 21-51-00 Fig. 7A

 (7)  
AMM 20-11-28/401, Lockwire

 (8)  
AMM 06-09-03/201, Body Section 44 Access Doors and Panels

 (9)  
AMM 21-00-00/201, Air Conditioning

 (10)
 AMM 36-00-00/201, Pneumatic System

 (11)
 WDM 21-51-11

 (12)
 WDM 21-51-12

 (13)
 WDM 21-51-13

 (14)
 SSM 21-51-01

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

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

 D.  Prepare for the Test
 S 865-026
 (1)  Release the pressure from the pneumatic system (AMM 36-00-00/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400
MAINTENANCE MANUAL

ELECTRICAL 
CONNECTOR 
PORT NO.  FUNCTION 
G1  SUPPLY 
PRESSURE - GSE 
G2  SIGNAL 
PRESSURE - GSE 
G1 TEST 
PORT PLUG 
G2 TEST 
PORT PLUG 

FLOW CONTROL VALVE TEST PORT AND SHUTOFF  PLUG TEST  CONNECTOR TEST SET  HOSE ASSEMBLY 
　
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