BAFFLE RIB
CHECK VALVE BAFFLE
(11 LOCATIONS) RIB (REF)
CHECK VALVE
CHECK VALVE SEEE E BAFFLE RIB DRAIN VALVE
D
SEE F
FLAPPER
VALVE BODY (REF) (REF)
VALVE BODY
IN THE 
FUEL TANK 
(REF) 
DRAIN  FWD  INBD 
LOWER SURFACE OF  LINE 
THE FUEL TANK (REF) 

CENTER TANK SUMP DRAIN VALVE
DRAIN VALVE (EXAMPLE) G
F
Fuel Tanks - Component Location Figure 102 (Sheet 2)
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 28-11-00
 ALL  ú ú 01 Page 103 ú Sep 20/90

A

757 MAINTENANCE MANUAL
 FUEL TANKS - MAINTENANCE PRACTICES
__________________________________
 1.  General_______
 A.  This procedure contains these tasks:
 (1)  
Purging and Fuel Tank Entry Precautions

 (2)  
Purging and Fuel Tank Entry

 (3)  
Biocide Treatment of Fuel Tanks

 B.  
If you make a decision not to do this recommended procedure, you must have an approved alternate procedure. Make sure the conditions during the purging and fuel tank entry operations give sufficient protection to the persons and equipment used in this procedure. It is possible that local fire codes, and standards make it necessary to use more restrictive procedures or more procedures than those given in the subsequent steps.

 C.  
The safety, fire and health limits in this procedure are used by Boeing at the manufacturing sites in the state of Washington. For fuel tank and confined space entry, Boeing is required to have an aircraft confined space entry program. This program is established to control the entry into confined spaces to protect the safety and health of persons who go into fuel tanks and other closed areas. Important requirements of the program include:

 (1)  
Identification and Warning Sign Placement

 (2)  
Observer Communication with Persons inside Confined Spaces

 (3)  
Entry Permit Requirements

 (4)  
Pre-entry Procedures

 (5)  
Entry Procedures

 (6)  
Emergency and Rescue Service

 (7)  
Training

 D.  
It is recommended that a fuel tank entry program which complies with the local, state and national regulations be followed.

 TASK 28-11-00-912-209
 2.  Purging and Fuel Tank Entry Precautions_______________________________________
　
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