gaskoseal again.
 S 864-016
 (24) Remove electrical power if it is not necessary (AMM 24-22-00/201).
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757 MAINTENANCE MANUAL
 SURGE TANK FUEL LEVEL SENSOR - REMOVAL/INSTALLATION
___________________________________________________
 1.  General_______
 A.  A fuel level sensor attaches to the rear spar of each surge tank, aft of the pressure relief valve of the surge tank. The fuel level sensor gives a signal to the control circuit of the fueling shutoff valve at a specified fuel tank level that causes the fueling shutoff valves to close.
 B.  This procedure contains two tasks. The first task removes the fuel level sensor. The second task installs the fuel level sensor.
 TASK 28-21-03-004-001
 2.  Remove the Fuel Level Sensor (Fig. 401)____________________________
 A.  References
 (1)  
AMM 06-44-00/201, Wing Access Doors and Panels

 (2)  
AMM 28-11-00/201, Fuel Tanks

 (3)  
AMM 28-11-03/401, Surge Tank Access Door

 (4)  
AMM 28-25-05/401, APU Fuel Line and Shroud

 B.  
Access

 (1)  
Location Zones 543 Surge Tank - Rib No. 21 to No. 23 (Left) 561 Rear Spar to Trailing Edge (Left) 643 Surge Tank - Rib No. 21 to No. 23 (Right) 661 Rear Spar to Trailing Edge (Right)

 (2)  
Access Panels
 543AB Surge Tank Access Door (Left)
 561BB Access Door (Left)
 643AB Surge Tank Access Door (Right)
 661BB Access Door (Right)

 C.  
Procedure

 S 864-002
 (1)  
Open this circuit breaker on the main power distribution panel, P6, and attach a DO-NOT-CLOSE tag:

 (a)  
6E5, FUELING CONTROL

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757
MAINTENANCE MANUAL

FUEL LEVEL SENSOR

Surge Tank Fuel Level Sensor Unit Installation
Figure 401

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