(4)  
Respirator - Full face-supplied, air type, U.S. Bureau of Mines approved

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 ú ALL ú ú ú 01A.101 Page 707 ú ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 (5)  
Rubber pants, boots and jacket with hood

 (6)  
Source of cold water (at approximately 50 psi)

 (7)  
Source of saturated steam

 (8)  
Steam Nozzle - Trigger T-Jet, Spraying Systems Co., Bellwood, Illinois, or equivalent

 NOTE: It is a good procedure to replace the teflon bushing
____ supplied with this nozzle with a locally fabricated brass bushing. The nozzle is made to have a source of saturated steam and a source of cold water attached. You must adjust each supply with a set of valves to supply a spray of approximately 100 psi, with a maximum temperature of 150°F, 6 inches from the nozzle end.
 (9)  Vacuum
 C. Consumable Materials
 (1)  G00250 Tape - pressure sensitive
 D. References
 (1)  
AMM 28-10-00/201, Storage

 (2)  
AMM 28-11-00/601, Integral Fuel Tanks

 (3)  
AMM 28-11-00/801, Integral Fuel Tanks

 (4)  
AMM 28-11-11/401, Wing Fuel Tank Access Doors

 (5)  
AMM 28-11-31/401, Center Tank Access Door

 (6)  
AMM 28-23-00/201, Defueling

 (7)  
Structural Repair Manual

 E. Access
 (1)  Location Zones
 221 Center Section Fuel Tank
 305 Left Wing Fuel Tank
 405 Right Wing Fuel Tank

 F. Clean the Fuel Tank
 S 657-035
 (1)  Defuel the applicable fuel tank (Ref 28-23-00/201).
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 28-11-00
 ú  ALL  ú
 ú ú  ú 01A.101 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 708Jul 12/02 

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737-300/400/500MAINTENANCE MANUAL
 S 867-036
 WARNING: OBEY ALL OF THE FUEL TANK PURGING AND ENTRY PRECAUTIONS.
_______ INJURIES TO PERSONS AND DAMAGE TO THE AIRPLANE CAN OCCUR.
 (2)  
Do the procedure: "Fuel Tank Purging and Entry" (Ref 28-10-00/201).

 S 017-037

 (3)  
Remove the applicable access doors for the fuel tank in the area that you must clean (Ref 28-11-11/401, 28-11-31/401).

 S 017-038

 (4)  
Remove the applicable sump drain valve (AMM 28-11-41/401, 28-11-61/201).

 S 017-039

 (5)  
Remove the necessary fuel tank equipment and support brackets to get access to the area that you must clean.

 (a)  Point the steam at approximately a 45-degree angle to the surface.
 S 167-040
 WARNING: OBEY ALL OF THE APPLICABLE PRECAUTIONS WHEN YOU CLEAN THE FUEL
_______ TANK WITH STEAM. INJURIES FROM THE STEAM OR DAMAGE TO THE FUEL TANK CAN EASILY OCCUR.
 (6)  While you clean with the steam, obey these precautions:
 (a)  
The person who does the task must have these items for protection: 1) Asbestos gloves 2) A full face mask 3) An asbestos hood or a rubber hood.

 (b)  
Use a steam line with a valve that closes automatically when you release it (a "dead man" valve).

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 28-11-00
 ú  ALL  ú
 ú ú  ú 01A.101 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 709Jul 12/02 

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737-300/400/500MAINTENANCE MANUAL
 (c)  
One person out of the tank must look for signs of a dangerous condition.

 (d)  
Use air movers to have a good flow of air in the tanks.
　
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