Fuel

Question 1

ENG VALVE CLOSED

Answer 1

Extinguished - HPSOV on the HMU is closed
Bright - In transit or disagrees with selected position
Dim - HPSOV on HMU is closed

Electrically powered by BB, fuel pressure actuated
Controlled by start lever or fire switch

Question 2

SPAR VALVE CLOSED

Answer 2

Extinguished - spar valve open
Bright - in transit or disagrees with selected position
Dim - spar valve is closed

Controlled by either the start lever or fire switch

Question 3

FILTER BYPASS

Answer 3

Indicates impending fuel filter bypass

Question 4

VALVE OPEN (Crossfeed)

Answer 4

Extinguished - valve is closed
Bright - in transit or disagrees with selected position
Dim - valve is open

Question 5

LOW PRESSURE (center pumps)

Answer 5

Illuminated - pump output pressure is low (<22 psi)

Extinguished - switch is off or pump output pressure is normal

Question 6

LOW PRESSURE (main tank pumps)

Answer 6

Illuminated - fuel pump output pressure is low (<6 psi) or switch is off
Extinguished - fuel pump output pressure is normal