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wing to let the fuel vapors leave the fuel tank. 7) Put the portable air compressor a minimum of 100 feet from the fuel tank that
will be opened, unless the air compressor is explosion-proof. 8) Connect the air compressor to the air mover with the air supply hose.  9) Connect a power supply to the air compressor.
(b)  For the auxiliary fuel tanks or surge tanks, do these steps:
1)  Assemble these ventilation equipment components (Fig. 203): a) tank adapter assembly - (P/N A28003-8) b) air mover assembly (P/N 28003-2) c) air supply hose
2)  Make sure each flexible air duct section is attached correctly and that each section is bonded correctly. 3) Set-up the air mover assembly away from the airplane.
WARNING: MAKE SURE THE AIR MOVER ASSEMBLY IS AWAY FROM THE AIRPLANE. THE EXHAUST AIR FROM THE AIR MOVER EXHAUST HORN MUST VENT AWAY FROM THE AIRPLANE STRUCTURE. IF THE EXHAUST AIR FLOWS AGAINST THE AIRPLANE STRUCTURE, A BUILD-UP OF STATIC ELECTRICITY CAN OCCUR. IT IS POSSIBLE THAT THE STATIC ELECTRICITY CAN IGNITE THE FUEL VAPOR AND CAUSE AN EXPLOSION. AN EXPLOSION CAN CAUSE SERIOUS INJURY OR DEATH TO PERSONS AND DAMAGE TO EQUIPMENT.
4) Ground the air mover assembly to the airplane ground.
5) Put the portable air compressor a minimum of 100 feet from the fuel tank that

will be opened, unless the air compressor is explosion-proof. 6) Connect the air compressor to the air mover assembly with the air hose. 7) Connect a power supply to the air compressor.
May 1/98  28-10-0
Page 227
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

(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. 4) Make sure you have enough segments to route the air ducts to the maintenance area.
(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 (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 heater/air blower. c) Connect the portable air compressor to a power source.

(d)  
　
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