Fuel Panel

Question 1

SPAR VALVE CLOSED lights (blue)

Answer 1

• extinguished = related spar fuel valve is open
• bright blue = related engine or spar fuel valve is in transit, or valve position and engine start lever or engine fire handle disagree
• dim blue = related spar or engine fuel valve is closed
• controlled by start lever or fire handle
• during engine start, goes bright to out

Question 2

ENG VALVE CLOSED lights (blue)

Answer 2

• extinguished = related engine valve is open
• engine fuel valve is the HPSOV on the HMU
• bright blue = related engine valve is in transit, or valve position and engine start lever or engine fire handle disagree
• dim blue = related spar or engine fuel valve is closed
• controlled by start lever or fire handle
• during engine start, goes bright to out

Question 3

FILTER BYPASS light

Answer 3

• indicates impending fuel filter bypass due to a contaminated filter
• some or all fuel is bypassing the filter
• may not be ice (fuel heat is automatic)

Question 4

CROSSFEED VALVE OPEN light

Answer 4

• extinguished = the crossfeed valve is closed (the normal situation)
• bright blue = crossfeed valve is in transit or valve position and crossfeed selector disagree
• dim blue = crossfeed valve is open

Question 5

CENTER TANK FUEL PUMP LOW PRESSURE lights

Answer 5

• illuminated = fuel pump output pressure is low and pump switch on (

Question 6

FUEL PUMP Switches

Answer 6

ON
-	activates fuel pump
-	two pumps for each tank (center, left wing, right wing)
OFF
-	deactivates fuel pump

Question 7

MAIN TANK FUEL PUMP LOW PRESSURE lights

Answer 7

• illuminated = fuel pump output pressure is low, or the pump switch is off (