757 AMM 飞机维护手册 燃油 CHAPTER 28 - FUEL 3(97)

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 a)  6E1, L SPAR VALVE
 b) 6E2, R SPAR VALVEFor the left spar valve, do a check for 28VDC power (21.0 VDC minimum, 34.0 VDC maximum) between these pins on the connectors, D2142.
 ~........................ | CONNECTOR D2142 | .......................... | FROM | TO | .......................... | pin 5 | pin 4 | | pin 6 | pin 4 | 2............…...........1
For the right spar valve, do a check for 28 VDC power (21.0 VDC minimum, 34.0 VDC maximum) between these pins on the connector, D2022.
 ~........................ | CONNECTOR D2022 | .......................... | FROM | TO | .......................... | pin 5 | pin 4 | | pin 6 | pin 4 | 2............…...........1
Open these circuit breakers and attach DO-NOT-CLOSE tags:
 1)  Main Power Distribution Panel, P6: a) 6E1, L FUEL SPAR VALVE b) 6E2, R FUEL SPAR VALVE
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MAINTENANCE MANUAL

 (l)  
For the left spar valve, re-connect the connector for the left spar valve actuator, D2142.

 (m)  
For the right spar valve, re-connect the connector for the right spar valve actuator, D2022.

 (n)  
For the left actuator, remove the DO-NOT-CLOSE tag and close this circuit breaker on the P6 panel: 1) 6E1, L FUEL SPAR VALVE 2) 6H1, FIRE EXTINGUISHING ENG L BTL 1 3) 6H2, FIRE EXTINGUISHING ENG L BTL 2

 (o)  
For the right actuator, remove the DO-NOT-CLOSE tag and close this circuit breaker on the P6 panel: 1) 6E2, R FUEL SPAR VALVE 2) 6H3, FIRE EXTINGUISHING ENG R BTL 1 3) 6H4, FIRE ENTINGUISHING ENG R BTL 2

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

 S 714-022
 (10)
 Do the steps that follow to do a test of the left actuator:

 (a)  
Make sure the L ENG FIRE switch on the pilots 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 after 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
　
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