(19)
Make sure these valves are closed:
NOTE: If you do this test with these valves open (for example
____ during a fuel transfer operation), it is possible that the low pressure indicating light will not go off when you operate the pump.
(a)
The engine fuel shutoff valve for the No. 1 tank
(b)
The engine fuel shutoff valve for the No. 2 tank
(c)
The crossfeed valve
(d)
The defuel valve
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757
MAINTENANCE MANUAL
S 864-088
(20) Push the applicable fuel boost pump or fuel override pump switch-light of the fuel management control panel on the overheadpanel, P5, to the ON position.
NOTE: Someone must be in the flight compartment when the pumps
____operate to continuously monitor for the low PRESS lights.
~................................................................. | PUMP | SWITCH-LIGHT | ................................................................... | Left aft fuel boost pump | L AFT PUMPS | ................................................................... | Left forward fuel boost pump | L FWD PUMPS | ................................................................... | Left fuel override pump *[1] | LEFT C PUMPS | ................................................................... | Right aft fuel boost pump | R AFT PUMPS | ................................................................... | Right forward boost pump | R FWD PUMPS | ................................................................... | Right fuel override pump *[1] | RIGHT C PUMPS | 2...................................….............................1 *[1] The fueling station door (621GB) must be open before the
left or right override pump will operate.
S 284-065
(21)
Listen and make sure the applicable fuel boost pump or fuel override pump operates.
S 214-066
(22)
Make sure the applicable PRESS light on the fuel management panel of the P5 panel goes off.
S 864-067
(23)
Push the applicable fuel boost pump or fuel override pump switch-light to the off position.
S 284-068
(24)
Listen and make sure the applicable fuel boost pump or fuel override pump does not operate.
S 214-069
(25)
For the fuel boost pumps, make sure the applicable PRESS light comes on.
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本文链接地址：757 AMM 飞机维护手册 燃油 CHAPTER 28 - FUEL 3(61)
