S 434-039

 (13)
 Connect the flexible full couplings (9) between the valve body (1) and the fuel line (AMM 28-25-05/401).

 S 414-040

 (14)
 Install the applicable left or right main tank access door, 541AB or 641AB (AMM 28-11-01/401).

 S 864-041

 (15)
 Supply electrical power (AMM 24-22-00/201).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A

757
MAINTENANCE MANUAL

 S 714-049
 (16)
 To do a test for the left engine fuel shutoff valve, do the steps that follow:

 (a)  
Make sure the LEFT ENG FIRE switch on the pilot's aft control stand, P8, is in the NORMAL position.

 (b)  
Open this circuit breaker on the main power distribution panel, P6, and attach a DO-NOT-CLOSE tag: 1) 6C1, FUEL COND CONT L

 (c)  
Put the L FUEL CONTROL switch on the P10 quadrant control stand to the RUN position.

 (d)  
Make sure the left SPAR VALVE disagreement light goes off when the left engine fuel shutoff valve opens.

 (e)  
Put the L FUEL CONTROL switch on the P10 quadrant control stand to the CUTOFF position.

 (f)  
Make sure the left SPAR VALVE disagreement light comes on.

 (g)  
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P6 panel: 1) 6C1, FUEL COND CONT L

 S 714-050
 (17)
 To do a test for the right engine fuel shutoff valve, do the steps that follow:

 (a)  
Make sure the RIGHT ENG FIRE switch on the pilot's aft control stand, P8, is in the NORMAL position.

 (b)  
Open this circuit breaker on the main power distribution panel, P6, and attach a DO-NOT-CLOSE tag: 1) 6C2, FUEL COND CONT R

 (c)  
Put the R FUEL CONTROL switch on the P10 quadrant control stand in the RUN position.

 (d)  
Make sure the right SPAR VALVE disagreement light goes off after the right engine fuel shutoff valve opens.

 (e)  
Put the R FUEL CONTROL switch on the P10 quadrant control panel in the CUTOFF position.

 (f)  
Make sure the right SPAR VALVE disagreement light comes on.

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