Term
| In auto mode, at what rate will the cabin climb and descend? |
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Definition
| Climb at 500' per minute, descend at 300' per minute |
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Term
| What areas does the bleed air leak detection system monitor? |
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Definition
| Wings, fuselage, and the engine pylons |
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Term
| What is the altitude limit for the APU to provide bleed air for air conditioning? |
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Definition
|
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Term
| What must you do when using low pressure air for cooling on the ground? |
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Definition
| Ensure that the main cabin door, avionics bay door, or service door is open to prevent the aircraft from pressurizing on the ground. |
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Term
| What happens to the cargo air when smoke is detected in the cargo bay? |
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Definition
| The cargo intake and exhaust air valves close. The cargo fan shuts down. The conditioned air valve closes and the heater (if installed) shuts down. |
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Term
| What is the source of the vacuum required to operate the outflow valves? |
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Definition
| 10th stage bleed air and a jet pump |
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Term
| What is the altitude limitation for single pack operations? |
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Definition
|
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Term
| What is 10th stage bleed air used for? |
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Definition
| Pressurization, air conditioning, and engine starts |
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Term
| What is 14th stage bleed air used for? |
|
Definition
| Thrust reverse, and anti-ice |
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Term
| What is low pressure ground air used for? |
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Definition
| Cooling of the aircraft on the ground. Cooling uses the manifolds, not the packs in this configuration |
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Term
| How can you change from one pressure controller to the other? |
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Definition
| Push the controller switch twice, or land |
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Term
| Duct Test, tests which bleed air system? |
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Definition
| Both 10th and 14th stage bleed air systems are tested. the test simulates a duct failure |
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Term
| When will the passenger oxygen masks drop automatically? |
|
Definition
| When CPAM detects a cabin altitude of 14,000 feet plus or minus 500 feet |
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Term
| What position do the 10th and 14th stage valves fail? |
|
Definition
| 14th stage valves fail open. 10th stage valves fail closed. The APU LCV valve fails in whatever position it is modulated |
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Term
| At what cabin altitude will the CPAM turn on the NO SMOKING and SEAT BELT signs? |
|
Definition
| When switches are in AUTO and the cabin altitude reaches 10,000 feet |
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Term
| What is the max Take Off, Land, and Taxi pressure? |
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Definition
|
|
Term
| What is high pressure ground air used for? |
|
Definition
| Air Conditioning (through the packs), and Engine starting |
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Term
| What happens when the emergency depress switch light is pressed in? |
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Definition
| Both outflow valves open allowing depressurization.Above 14,000 feet cabin will depressurize to 14,000 feet plus or minus 700 feet. Below 14,000 feet cabin will depressurize completely. |
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Term
| When is the auto pressurization activated during take-off? |
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Definition
| At 85% power lever angle. |
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Term
| Explain the return to field parameters of the automatic pressurization system. |
|
Definition
| Below 6000 feet or a descent of 1000 feet per min within 10 minutes. The field elevation does not need to be reset during a return to field |
|
|
Term
| What four things happen when a pack fails? |
|
Definition
| The Pack shuts down, the pack valve closes, 10th stage ISOL valve closes, and the affected 10th stage valve closes |
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Term
| How do you supply APU bleed air to the right pack? |
|
Definition
| Open the LCV and 10th stage ISOL valve |
|
|
Term
| Will the oxygen masks auto deploy if there is a CPAM failure? |
|
Definition
|
|
Term
| Explain APU LCV interlock. |
|
Definition
| Inter lock looks at switch position and uses logic to open/close the LCV. This serves as a back up to the APU check valve ( not shown on EICAS ) to protect the APU from back pressure |
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Term
| How do the outflow valves open? |
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Definition
| They are electro-pneumatically controlled |
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Term
| Do outflow valves require 10th or 14th stage air to open? |
|
Definition
|
|
Term
| How is the pack air distributed through the aircraft? |
|
Definition
| 70 % of the left pack air is routed to the flight deck, 70 % of the right pack air is routed to the cabin |
|
|
Term
| What is used to cool the air to air heat exchangers? |
|
Definition
|
|
Term
| In auto mode, at what rate will the cabin climb and descend? |
|
Definition
| Climb at 500 fpm, descend at 300 fpm |
|
|
Term
| What areas does the bleed air leak detection system monitor? |
|
Definition
| Wings, fuselage, and the engine pylons |
|
|
Term
| What is the altitude limit for the APU to provide bleed air for air conditioning? |
|
Definition
|
|
Term
| What must you do when using low pressure air for cooling on the ground? |
|
Definition
| Make sure that the main cabin door, avionics bay door, or service door is open to prevent the aircraft from pressurizing on the ground |
|
|
Term
| What happens to the cargo air when smoke is detected in the cargo bay? |
|
Definition
| The cargo intake and exhaust air valves close. The cargo fan shuts down. The conditioned air valve closes and the heater shuts down |
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