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35 Cards in this Set
- Front
- Back
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What is the very first thing you should check before operating the APU?
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ADB
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What do you look for in the ADB?
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1. Recent discrepancies against the APU.
2. What type of APU. 3. Other limiting descrepancies. (i.e.AE's no power, AM's no hydraulics) |
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Where is the APU HRD bottle located?
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In the nose wheel well.
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Where is the APU HRD bottle placard located?
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In the nose wheel well.
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What should the Refrigerant tubes be serviced to?
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More than a quarter way to the top of sight guage.
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What should the APU oil be serviced to?
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More than half way to the top of sight guage.
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What should the Air Multiplier be serviced to?
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More than half way to the top of sight guage.
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What three things will the APU safety switch do when switched to the "SAFE" position?
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1. Disables Intake and Exahust Doors
2. Disables HRD bottle. 3. Disables detection. |
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What is the minimum battery voltage required for starting the APU?
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22 VOLTS DC
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Where would you find what type of APU is installed in your aircraft?
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In the ADB.
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What will automatically shut down an APU?
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1. Engine overspeed.
2. Loss of APU oil pressure. 3. APU compartment fire. |
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What fuel tank normally feeds the APU?
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Tank #2.
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How much fuel is required to run the APU? Why?
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1000 LBS minimum.
For adequate hydraulic cooling. |
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What should you check if the APU does nothing when depressing the start switch?
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1. Connect Battery
2. Reset nose landing gear uplock. |
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What will happen if APU fire alarm goes off?
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APU fire extinguisher system will be activated.
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What should you do if the APU fire alarm goes off?
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Evacuate the aircraft immediately.
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What is the power source for the APU fire detection system?
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The battery.
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How much fuel does the APU consume while operating?
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300 pounds per hour.
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What mode should you operate the air conditioner in when starting the APU?
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Off position.
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What mode should you operate the air conditioner in when you dehumidify?
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AUTO 2-DOT, then gradually increase to 3-DOT.
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What position should the TAS probe heater be in prior to APU start?
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Off position.
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Which covers shall be removed prior to APU operation?
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Pitot, TAS and AOA probe covers NTB removed.
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Which sight guage inside the "Fire Extinguisher" door is the APU oil level sight guage?
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The lower sight guage.
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What position should the bomb bay doors switch be in?
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It should agree with bomb bay door position.
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What position should the flap position handle be in?
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Flap lever position should agree with flap position.
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What is the only thing measured in Fahrenheit?
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The fire detection system.
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What are the RPM limits and auto shutdown for the APU?
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98-102% (On Ground)
98-103% (In Flight) 106% (Auto Shutdown) |
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What circuit breaker should be closed before starting APU?
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The intake door breaker.
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What is the maximum PSI for aircraft fueling?
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55 PSI
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If RPM limits drop, what can you do to maintain them within limits?
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Turn on No.2 Fuel boost pump.
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If RPM limits rise, what can you do to reduce RPM to within limits?
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Turn on air multiplier.
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what are the egt limits for -10
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732 max peak 710 max 10 seconds 649 max continuous |
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what are the egt limits for -3
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704 max peak - max 10 seconds 649 max continuous |
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what are the egt limits for -2
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715 max peak 710 max 10 seconds 688 max continuous |
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what does egt stand for
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exhaust gas temperature
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