Overhead Fuel

Question 1

What does pushing an override fuel pump to ON do?

Answer 1

Pump operates by system logic. (Pumps come on when center pumps are off depending on fuel level)

(#2 and #3 aft come on no matter switch position for APU operation)

Question 2

What does switching Main Tank or Center Tank fuel pumps to on do?

Answer 2

Pumps selected on and begin running.

Question 3

What makes a fuel pump PRESS light illuminate?

Answer 3

Fuel output pressure is low

Question 4

What makes a VALVE light illuminate on a fuel crossfeed switch?

Answer 4

2 and #3: Valve not in system logic commanded position

Question 5

What does the white bar mean on a fuel crossfeed switch?

Answer 5

#2 and #3: Valve opens by system logic
#1 and #4: Valve is commanded open

Question 6

Fuel Jettison Nozzle Valve switches

On

OFF

Answer 6

ON: Jettison Nozzle valve selected open
Activates override/jettison pumps in tanks containing fuel (pump switches must be on)

Off: jettison nozzle valve selected closed

Question 7

Fuel Jettison Nozzle Valve LIGHTS (AMBER)

Answer 7

Jettison nozzle valve not in selected position

Question 8

Fuel Jettison Selector

OFF:

A or B:

Answer 8

Off: disarms jettison system
Removes EICAS fuel to remain indication

A or B: Arms jettison system
Displays preselcted fuel to remain on EICAS

Question 9

Defuel
Rsv 2 &;3 XFER

Close:

Open:

Answer 9

Close: Reserve 2 and 3 transfer valves closed
Reserve 2 and 3 transfer valves open when
commanded by system logic

Open: Reserve 2 and 3 transfer valves open

Question 10

Fuel Xfer Main 1 &; 4

Answer 10

ON - main 1 and 4 transfer valves open

OFF - Main 1 and 4 transfer valves closed
Main 1 and 4 transfer valves open when
commanded by system logic