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15 Cards in this Set
- Front
- Back
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How many tanks? |
3: No. 1 Center No. 2 |
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How is the APU fueled? |
From left fuel manifold from No. 1 tank by pumps (with AC power) or by suction feed (without AC power) |
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Where and how is fuel consumed first? |
Center tank, pump has slightly higher output pressure |
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How is correct fuel flow ensured? |
Check valves |
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Explain blue light on valve indicators |
Dim blue: valve is closed Bright blue: valve is in transit or disagreement Extinguished: valve is open |
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What does CROSS FEED selector control? Powered by? |
Cross feed valve to connect L and R tank manifolds under pressure. DC power from the battery bus. |
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Meaning of amber FILTER BYPASS lights? How many lights? |
Impending bypass caused by contaminated fuel filter. 2 lights |
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Type of current to fuel temperature indicator? |
AC |
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How many fuel pumps? How are fuel pumps powered? How are they cooled and lubricated? |
2 pumps per tank AC powered By passing fuel |
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What monitors output pressure of the pumps? |
Associated sensor per pump |
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What should you be aware of using suction feed? |
As pressure decreases, dissolved air from the fuel may collect in feed line and restrict fuel. This air will deplete after reaching cruise altitude. |
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When is suction feed used? Suction feed used on center tank? |
When fuel pump pressure is low. No |
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What do you suspect with amber IMBAL indication under fuel quantity gauge? |
Fuel leak. ENGINE FUEL LEAK CHECKLIST |
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When is CONFIG on center tank gauge indicated? |
- either engine running - both fuel pump switches OFF - center tank fuel more than 726 kgs |
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When will CONFIG alert disappear? |
- both engines shut down - less than 363 kgs quantity - one center fuel tank pump turning ON |
