REVIEW QUESTIONS – FIRE PROTECTION Flashcards Preview

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Flashcards in REVIEW QUESTIONS – FIRE PROTECTION Deck (18)
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1

1. What happens when either illuminated Master FIRE WARN light is pushed?

-Extinguishes both FIRE WARN lights, Silences Fire Warning Bell, resets the system, and silences the Remote APU Warning Horn (on the ground)

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2. Which other switch provides the same function as pushing either Master Fire Warn light for an engine fire warning?

-Fire Warning BELL CUTOUT switch

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3. Which Bus powers the Engine Overheat and Fire Detection? Which Bus powers the Engine Fire Extinguishing?

Battery Bus -Hot Battery Bus

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4. What will cause an illuminated ENG OVERHEAT light and/or Engine Fire Switch to extinguish?

-The temperature to drop below the preset value.

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5. With the OVHT DET switch in the A or B position, what initiates an overheat or fire warning?

-The system acts like a single loop.

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6. With the OVHT DET switch selected to “A”, during an Overheat/Fire Test, what does a FAULT light (amber) indication mean?

-The A loop has failed.

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7. If one overheat/fire detector loop fails with the OVHT DET switch on NORMAL, how is a fire detected?

-The system has a fault monitoring circuit, and deselects the inop loop, acting like a single loop system.

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8. What does rotating an Engine Fire Switch do?

-Shoots a squib into the related engine.

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9. What causes a Fire Switch to unlock?

-Illumination of an Engine Fire Switch or ENG OVERHEAT light

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10. Which Bus powers the APU Overheat and Fire Detection? Which Bus powers the APU Fire Extinguishing?

-Battery Bus -Hot Battery Bus

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11.What does pressing the HORN CUTOUT switch on the APU Fire ControlPanel (main wheel well) do?

-Silences the Fire Warning Bell, silences the APU Fire Warning Horn, and causes the APU Fire Warning Light to stop flashing, but it remains illumated

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12. What power source is required for Main Wheel Well fire detection?

-AC power (#2 AC Transfer Bus)

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13. What components are tested with the Overheat/Fire Protection Panel Test Switch to OVHT/FIRE?

-Overheat and Fire loops on both engines, the APU, and fire detector in the wheel well.

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14. What components are tested with the Overheat/Fire Protection Panel Test Switch to FAULT/INOP?

-Fault detection circuits for both engines and the APU

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15. What does a FAULT light (amber) illuminating during an OVHT FIRE indicate?

-A bad loop

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16. What does the ENGINES APU EXT/TEST switch test?

-Tests the engine’s squibs (left and right) for the engine tested, and the APU squib

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17. What does a DETECTOR FAULT light (amber) illuminated indicate when TEST is pushed and held on the Boeing Cargo Fire Panel?

-one or more detector loops has failed

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18. When does the first bottle on the Boeing Lower Cargo Compartment Fire Suppression Dual Bottle system discharge? The second bottle?

-When you push the DISCH switch
-Automatically 60 minutes later, at a metered rate for a total of 135 minutes