38-15-66
 ú ú 02 Page 202 ú Jun 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 022-006
 WARNING: PRESSURE RELIEF VALVES WITH PART NUMBER D524TP6D60;
_______ DO NOT TURN THE DEFLECTOR CAP WHEN YOU REMOVE OR INSTALL THE PRESSURE RELIEF VALVE. THE PRESSURE AT WHICH THE RELIEF VALVE RELEASES PRESSURE CAN CHANGE IF THE DEFLECTOR CAP TURNS. IF THE PRESSURE RELIEF VALVE DOES NOT RELEASE THE PRESSURE, INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
 (5)  
Remove the pressure relief valve.

 S 032-007

 (6)  
Remove and discard the O-ring.

 TASK 38-15-66-382-008
 3.  Pressure Relief Valve Installation (Fig. 201)__________________________________
 A. Consumable Materials
 (1)  D00463 Lubricant - White Protopet 1S (Witco Corp, New York, NY 07804)
 B. References
 (1)  
AMM 24-22-00/201, Manual Control

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

 (3)  
AMM 38-15-60/201, Water System Pressurization

 C. Access
 (1)  Location Zone 124 // Forward Cargo Container Compartment Aft Half, Right
 D. Procedure
 S 642-019
 (1)  Apply a thin layer of white protopet 1S lubricant on the surfaces of the new O-ring.
 S 422-009
 WARNING: PRESSURE RELIEF VALVES WITH PART NUMBER D524TP6D60;
_______ DO NOT TURN THE DEFLECTOR CAP WHEN YOU REMOVE OR INSTALL THE PRESSURE RELIEF VALVE. THE PRESSURE AT WHICH THE RELIEF VALVE RELEASES PRESSURE CAN CHANGE IF THE DEFLECTOR CAP TURNS. IF THE PRESSURE RELIEF VALVE DOES NOT RELEASE THE PRESSURE, INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
 (2)  Install the pressure relief valve with the new O-ring.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. FREIGHTERS ú

 38-15-66
 ú ú 02 Page 203 ú Oct 10/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 862-010
 (3)
Do this task: "Water System Pressurization" (AMM 38-15-60/201).

 S 792-011

 (4)
Make sure there is no air leakage from the valve connection.

 S 412-012

 (5)  
Do the "Containerized Cargo Compartment Ceiling and Sidewall Linings Installation" task (AMM 25-52-01/401) to install the sidewall and ceiling panels.

 S 862-013

 (6)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 TASK 38-15-66-702-014
 4. Pressure Relief Valve Test (Fig. 202)
 A. Standard Tools and Equipment
 (1)  
Gage - Pressure (0-75 psig |0.5 psig)

 (2)  
Valve - Control (pressure rating 150 psig minimum, 3/8 inch minimum globe type, 15 scfm minimum flow at 50 psid).

 (3)  
Regulator - Pressure (pressure rated for air source, outlet pressure adjustable, zero to 80 psig, 3/8 inch minimum).

 (4)  
Filter Air (in-line type)

 (5)  
Compressed Air Supply (80 psig, 15 scfm minimum)

 B. References
 (1)  
24-22-00/201, Manual Control

 (2)  
36-00-00/201, Pneumatics

 (3)  
38-15-60/201, Water System Pressurization

 C. Access
 (1)  Location Zone 124 Forward Cargo Container Compartment Aft Half, Right
 D. Procedure
 S 012-015
 WARNING: PRESSURE RELIEF VALVES WITH PART NUMBER D524TP6D60;
_______ DO NOT TURN THE DEFLECTOR CAP WHEN YOU REMOVE OR INSTALL THE PRESSURE RELIEF VALVE. THE PRESSURE AT WHICH THE RELIEF VALVE RELEASES PRESSURE CAN CHANGE IF THE DEFLECTOR CAP TURNS. IF THE PRESSURE RELIEF VALVE DOES NOT RELEASE THE PRESSURE, INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
 (1)  Remove the pressure relief valve per the task above.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. FREIGHTERS ú
　
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