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Flashcards in REVIEW QUESTIONS – FUEL Deck (14)
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1. What is the indication that the Nitrogen Generator System (NGS) is not operating?

-with either the INOPERATIVE (amber) light on or no lights on

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2. What does the LOW (amber) fuel alert indicate?

-Main Tank has less than 2000 lbs of fuel (for greater than 30 seconds)

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3. When does the CONFIG (amber) alert display on fuel quantity gauges?

Center Tank is greater than 1600 lbs, both CTR FUEL PUMP switches are off, and either engine is running

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4. What does the IMBAL (amber) alert mean?

-The difference between Main tank quantity is at least 1000 lbs for 60 seconds or longer. Extinguishes when they are less than 200 lbs different.

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5. Why is center tank fuel burned first, even though all fuel pumps are operating?

-Center tank fuel pumps have a much greater output pump pressure (23 psi vs 10 psi)

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6. Will the LOW PRESSURE light (amber) illuminate if a main tank FUEL PUMP switch is placed to OFF?

-Yes

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7. The Center Tank Fuel Pump switches are ON. What does a CTR PUMP LOW PRESSURE light (amber) indicate? Will the pump shut off?

-low fuel pressure downstream of the pump. Yes, after a continuous LOW PRESSURE signal of 15 seconds. Logic can be reset by placing the pump off and then back on.

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8. When do the Fuel Annunciator and MASTER CAUTION LIGHTS illuminate for a Center Tank Fuel Pump LOW PRESSURE light?

-after a 10 second continuous LOW PRESSURE signal

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9. What is the purpose of the Crossfeed valve?

-to allow one tank to feed both engines

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10. What does a Crossfeed VALVE OPEN light (bright blue) indicate?

-The valve is in transit or disagrees with the selector position

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11. What can suction feed from the No. 1 Main Tank? The No. 2 Main Tank?

-Each engine can suction feed from its own tank

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12. Where is the Fueling Receptacle?

-At the fueling station mid-point right wing, and provides a single point refueling

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13. What closes both the Spar Fuel Shutoff Valve and the Engine Fuel Shutoff Valve?

-Pulling the Fire Switch or Start Lever is placed to CUTOFF

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14. What does an ENG VALVE CLOSED (bright blue) light indicate? When would you expect to see it?

-The valve is in transit or valve position disagrees with Engine Start lever or Engine Fire Switch.
-During engine starts (moving Start Lever to idle) or during engine shutdown (Start Lever to CUTOFF or pulling the Fire Switch).