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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 13) Put the portable air compressor a minimum of 100 feet (30 meters) from the fuel tank that will be opened, unless the air compressor is explosion-proof.
 14) Connect the air compressor to the air mover assembly with the air hose. 15) Connect a power supply to the air compressor.
 S 492-369
 (7)  AIR BLOWER TYPE VENTILATION EQUIPMENT (BOE-501 OR EQUIVALENT); Do these steps to prepare the air ventilation equipment for purging (Fig. 203):
 (a)  
Set-up the ventilation blower(s) in an area where the fuel tank entry will be made. 1) Make sure the ventilation blower will be in an area free

 from fuel vapor when the access doors are open.

 (b)  
Attach the static grounding cable on the ventilation blower(s) to an approved ground source.

 (c)  
Do these steps to connect an air supply to the ventilation blower: 1) If shop air is used, connect an air supply hose to the

 ventilation blower. 2) If a portable air compressor is used, do these steps:
 a)  Put the air compressor a minimum of 100 feet (30 meters) from the fuel tank that will be opened, unless the air compressor is explosion-proof.
 b)  Connect an air supply hose from the air compressor to the ventilation blower. c) Connect the portable air compressor to a power source.
 (d)  
Do these steps to connect the air ducts to the ventilation blower. 1) Connect the eight inch (200-mm) air duct to the ventilation

 blower outlet port. 2) Connect enough air duct segments to get to the access door where you will do maintenance. 3) Use the attached bonding connections to electrically bond each air duct segment.

 (e)  
For main tank maintenance outboard of the engine, attach the access door adapter to the end of the air duct.

 (f)  
For main tank maintenance inboard of the engine, do these steps to prepare the air ducts that will go inside the fuel tank:

 NOTE: The air ducts will be positioned inside the fuel tank at
____ the location where you will do the maintenance.
 1)  Attach an adapter/reducer to the end of the eight-inch
 (200-mm) air duct segments. 2) Attach the four-inch (100-mm) air ducts. 3) Use the attached bonding connections to electrically bond
 each air duct segment.
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737-300/400/500MAINTENANCE MANUAL
 4)  Make sure you have enough segments to route the air ducts to the maintenance area.
 S 492-370
 (8)  HEATER AIR/BLOWER EQUIPMENT; Do these steps to prepare the heater/air blower equipment for purging (if it is necessary):
 NOTE: The use of a heater/air blower is for the comfort of persons
____ in the fuel tank. It is not part of the air ventilation equipment which is used to remove hazardous fuel vapor during the fuel purging procedure.
 (a)  
Set-up the heater/air blower in the area where the fuel tank entry will be made. 1) Make sure the heater/air blower will be in an area free

 from fuel vapor when the access doors are open.

 (b)  
Attach the static grounding cable on the heater/air blower(s) to an approved ground source.

 (c)  
Do these steps to connect an air supply to the blower: 1) If shop air is used, connect an air supply hose to the heater/air blower. 2) If a portable air compressor is used, do these steps:

 a)  Put the air compressor a minimum of 100 feet from the fuel tank that will be opened, unless the air compressor is explosion-proof.
 b)  Connect an air supply hose from the air compressor to the heater/air blower. c) Connect the portable air compressor to a power source.
 (d)  Do these steps to connect the air ducts to the heater/air blower. 1) Connect the air duct to the heater/air blower outlet port. 2) Connect enough air duct segments to get to the maintenance
 area.
 3)  Connect the air duct segments to the inlet port on the ventilation blower (if it is necessary for your ventilation system set-up).
 4)  Use the attached bonding connections to electrically bond each air duct segment.
　
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