(b)  
No. 2 main tank OVRD/JETT aft pump

 (c)  
No. 2 main tank OVRD/JETT forward pump

 (d)  
No. 3 main tank OVRD/JETT aft pump

 (e)  
No. 3 main tank OVRD/JETT forward pump

 S 715-119
 (6)  
Do these steps to test the control function of the fuel system management control cards (FSMC) on the override/jettison pumps.

 (a)  
Put these center wing tank override/jettison pump switches to the ON position: 1) CTR L 2) CTR R

 (b)  
Make sure the white ON indication light in each switch comes on.

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 (c)
(d)

(e)

(f)

(g)

(h)

A
747-400 MAINTENANCE MANUAL
Monitor the fuel synoptic.
 1)  Make sure the pump box symbols for the center wing tank override/jettison pumps change color in this sequence: a) White (pump off) b) Amber (pump on - low pressure) (momentarily) c) Green (pump on - pressure)
Put these override/jettison pump switches for the No. 2 and No. 3 main tanks to the ON position: 1) OVRD 2 FWD 2) OVRD 2 AFT 3) OVRD 3 FWD 4) OVRD 3 AFTMake sure the white ON indication light in each switch comes on.Monitor the fuel synoptic. 1) Make sure the pump box symbols for the override/jettison
 pumps for the No. 2 and No. 3 main tanks change color in
 this sequence:
 a) White (pump off)
 b) Cyan (pump armed or standby)

 2)  Put these override/jettison pump switches to the off position (the white ON indication light in each switch does not show): a) CTR L b) CTR R
Monitor the fuel synoptic.
 1)  Make sure the pump box symbols for the override/jettison pumps in the center wing tank change color in this sequence: a) Green (pump on - pressure) b) Amber (pump on - low pressure) (does not always show) c) White (pump off)
 2)  Make sure the pump box symbols for the override/jettison pumps for the No. 2 and No. 3 main tanks change color in this sequence: a) Cyan (armed or standby) b) Amber (pump on - low pressure) (does not always show) c) Green (pump on - pressure)
Put these override/jettison pump switches to the off position (white ON indication light in the switch does not show): 1) OVRD 2 FWD 2) OVRD 2 AFT 3) OVRD 3 FWD
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A
747-400 MAINTENANCE MANUAL
 4)  OVRD 3 AFT
 (i)  
Monitor the fuel synoptic.

 1)  Make sure the pump box symbols for the override/jettison pumps for the No. 2 and No. 3 main tanks change color in this sequence: a) Green (pump on - pressure) b) Amber (pump on - low pressure) (does not always show) c) White (pump off)

 (j)  
After approximately 15 seconds, look at the main and auxiliary EICAS displays. 1) Make sure these EICAS message show:

 a) FUEL OVRD CTR L (advisory) b) FUEL OVRD CTR R (advisory) c) FUEL OVRD 2 AFT (advisory) d) FUEL OVRD 2 FWD (advisory) e) FUEL OVRD 3 AFT (advisory) f) FUEL OVRD 3 FWD (advisory)
 2)  Make sure these EICAS message do not show: a) FUEL OVRD CTR L (status) b) FUEL OVRD CTR R (status) c) FUEL OVRD 2 AFT (status) d) FUEL OVRD 2 FWD (status) e) FUEL OVRD 3 AFT (status) f) FUEL OVRD 3 FWD (status)
 H.  Put the Airplane Back to Its Usual Condition
 S 095-102
 (1)  
Remove the tail support equipment, if it is not necessary (AMM 07-11-08/201).

 (2)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 S 865-105
 TASK 28-22-00-705-108
 4.  Engine Spar Valve Operational Test__________________________________
 A.  General
 (1)  This task does a test of the engine fuel shutoff valve (spar valve) indication and operation.
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