1. On the Cabin Pressurization Panel, what has occurred if both the amber AUTO FAIL light and the green ALTN light is illuminated?

1. On the Cabin Pressurization Panel, what has occurred if both the amber AUTO FAIL light and the green ALTN light is illuminated? • a single channel controller failure has occurred

2. The OFF SCHED DESCENT light indicates the aircraft began descent before having reached the planned cruise altitude. What does the controller program the cabin to?

2. The OFF SCHED DESCENT light indicates the aircraft began descent before having reached the planned cruise altitude. What does the controller program the cabin to? • to land at the takeoff field elevation without further pilot inputs

3. Which stages of the compressor section is bleed air is obtained from (NG aircraft)?

3. Which stages of the compressor section is bleed air is obtained from (NG aircraft)? • 5th; 9th

4. The ___ high-stage valve modulates open to maintain proper pressure when 5th low-stage pressure is insufficient (NG aircraft).

4. The ___ high-stage valve modulates open to maintain proper pressure when 5th low-stage pressure is insufficient (NG aircraft). • 9th

5. The engine bleed air valve is normally _____ operated and DC power activated.

5. The engine bleed air valve is normally _____ operated and DC power activated. • pneumatically

6. What does the illumination of the BLEED TRIP OFF light indicate?

6. What does the illumination of the BLEED TRIP OFF light indicate? • engine bleed air temperature or pressure exceeds a predetermined limit

7. When the BLEED TRIP OFF light illuminates, what effect does this have on the engine bleed air system?

7. When the BLEED TRIP OFF light illuminates, what effect does this have on the engine bleed air system? • The respective engine bleed air valve closes automatically

8. The isolation valve is _____ when the isolation valve switch in AUTO, both engine bleed air switches ON, and both air conditioning pack switches AUTO or HIGH.

8. The isolation valve is _____ when the isolation valve switch in AUTO, both engine bleed air switches ON, and both air conditioning pack switches AUTO or HIGH. • closed

9. The isolation valve is _____ when the isolation valve switch in AUTO, if either an engine bleed air switch or an air conditioning pack switch is positioned OFF.

9. The isolation valve is _____ when the isolation valve switch in AUTO, if either an engine bleed air switch or an air conditioning pack switch is positioned OFF. • open

10. Turning the APU bleed air switch OFF with the PACK switches in AUTO will cause the isolation valve to open.

10. Turning the APU bleed air switch OFF with the PACK switches in AUTO will cause the isolation valve to open. • False

11. The APU bleed air valve is___ operated and ______ activated.

11. The APU bleed air valve is___ operated and ______ activated. • pneumatically; DC

12. Engine thrust must be _______ with the DUAL BLEED light illuminated.

12. Engine thrust must be _______ with the DUAL BLEED light illuminated. limited to idle

13. ______causes a WING-BODY OVERHEAT condition.

13. ______causes a WING-BODY OVERHEAT condition. • a bleed air duct leak

14. Which WING-BODY OVERHEAT light will illuminate if a leak in the bleed duct from the APU occurs?

14. Which WING-BODY OVERHEAT light will illuminate if a leak in the bleed duct from the APU occurs? • Left

15. The isolation valve _________ if either engine BLEED air or air condition PACK switch is positioned OFF with the ISOLOATION VALVE switch in AUTO.

15. The isolation valve _________ if either engine BLEED air or air condition PACK switch is positioned OFF with the ISOLOATION VALVE switch in AUTO. • automatically opens

16. Conditioned air from which PACK, upstream of the mix manifold, flows directly to the flight deck?

16. Conditioned air from which PACK, upstream of the mix manifold, flows directly to the flight deck? • left pack

17. Air from the left pack, air from the right pack, and air from the recirculation system is combined within the _______.

17. Air from the left pack, air from the right pack, and air from the recirculation system is combined within the _______. • mix manifold

18. On the ground, the APU can supply air for ________ for all operations.

18. On the ground, the APU can supply air for ________ for all operations. • two packs

19. With the air conditioning PACK switches in AUTO and both packs are operating _________.

19. With the air conditioning PACK switches in AUTO and both packs are operating _________. • the packs provide “normal air flow”

Air Systems/Pneumatics/Air Conditioning/Pressurization Flashcards by Doug Wirzberger

On the Cabin Pressurization Panel, what has occurred if both the amber AUTO FAIL light and the green ALTN light is illuminated?

On the Cabin Pressurization Panel, what has occurred if both the amber AUTO FAIL light and the green ALTN light is illuminated?

• a single channel controller failure has occurred

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The OFF SCHED DESCENT light indicates the aircraft began descent before having reached the planned cruise altitude. What does the controller program the cabin to?

The OFF SCHED DESCENT light indicates the aircraft began descent before having reached the planned cruise altitude. What does the controller program the cabin to?

• to land at the takeoff field elevation without further pilot inputs

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Which stages of the compressor section is bleed air is obtained from (NG aircraft)?

Which stages of the compressor section is bleed air is obtained from (NG aircraft)?

• 5th; 9th

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The ___ high-stage valve modulates open to maintain proper pressure when 5th low-stage pressure is insufficient (NG aircraft).

The ___ high-stage valve modulates open to maintain proper pressure when 5th low-stage pressure is insufficient (NG aircraft).

• 9th

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The engine bleed air valve is normally _____ operated and DC power activated.

The engine bleed air valve is normally _____ operated and DC power activated.

• pneumatically

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What does the illumination of the BLEED TRIP OFF light indicate?

What does the illumination of the BLEED TRIP OFF light indicate?

• engine bleed air temperature or pressure exceeds a predetermined limit

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When the BLEED TRIP OFF light illuminates, what effect does this have on the engine bleed air system?

When the BLEED TRIP OFF light illuminates, what effect does this have on the engine bleed air system?

• The respective engine bleed air valve closes automatically

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The isolation valve is _____ when the isolation valve switch in AUTO, both engine bleed air switches ON, and both air conditioning pack switches AUTO or HIGH.

The isolation valve is _____ when the isolation valve switch in AUTO, both engine bleed air switches ON, and both air conditioning pack switches AUTO or HIGH.

• closed

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The isolation valve is _____ when the isolation valve switch in AUTO, if either an engine bleed air switch or an air conditioning pack switch is positioned OFF.

The isolation valve is _____ when the isolation valve switch in AUTO, if either an engine bleed air switch or an air conditioning pack switch is positioned OFF.

• open

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Turning the APU bleed air switch OFF with the PACK switches in AUTO will cause the isolation valve to open.

Turning the APU bleed air switch OFF with the PACK switches in AUTO will cause the isolation valve to open.

• False

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The APU bleed air valve is___ operated and ______ activated.

The APU bleed air valve is___ operated and ______ activated.

• pneumatically; DC

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Engine thrust must be _______ with the DUAL BLEED light illuminated.

Engine thrust must be _______ with the DUAL BLEED light illuminated.

limited to idle

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______causes a WING-BODY OVERHEAT condition.

______causes a WING-BODY OVERHEAT condition.

• a bleed air duct leak

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Which WING-BODY OVERHEAT light will illuminate if a leak in the bleed duct from the APU occurs?

Which WING-BODY OVERHEAT light will illuminate if a leak in the bleed duct from the APU occurs?

• Left

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The isolation valve _________ if either engine BLEED air or air condition PACK switch is positioned OFF with the ISOLOATION VALVE switch in AUTO.

The isolation valve _________ if either engine BLEED air or air condition PACK switch is positioned OFF with the ISOLOATION VALVE switch in AUTO.

• automatically opens

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Conditioned air from which PACK, upstream of the mix manifold, flows directly to the flight deck?

Conditioned air from which PACK, upstream of the mix manifold, flows directly to the flight deck?

• left pack

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Air from the left pack, air from the right pack, and air from the recirculation system is combined within the _______.

Air from the left pack, air from the right pack, and air from the recirculation system is combined within the _______.

• mix manifold

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On the ground, the APU can supply air for ________ for all operations.

On the ground, the APU can supply air for ________ for all operations.

• two packs

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With the air conditioning PACK switches in AUTO and both packs are operating _________.

With the air conditioning PACK switches in AUTO and both packs are operating _________.

• the packs provide “normal air flow”

When one pack is operating, _________ with the air conditioning PACK switches in AUTO.

When one pack is operating, _________ with the air conditioning PACK switches in AUTO.

• the operating pack provides high air flow

Anytime the pack valve closes on the B737 -700, the air mix valves are driven to the _______ position automatically.

Anytime the pack valve closes on the B737 -700, the air mix valves are driven to the _______ position automatically.

• full cold

In the automatic temperature mode on the B737 -700, the ________ are operated by the automatic temperature controller.

In the automatic temperature mode on the B737 -700, the ________ are operated by the automatic temperature controller.

• air mix valves

The automatic temperature controller is bypassed when the temperature selector is positioned to ________ on the B737-700,

The automatic temperature controller is bypassed when the temperature selector is positioned to ________ on the B737-700,

• MANUAL

The ram air system is used to provide cooling for what part of the air conditioning systems?

The ram air system is used to provide cooling for what part of the air conditioning systems?

• heat exchangers

25. A DUCT OVERHEAT light causes the appropriate air mix valve to drive ___________ on a B737-700.

25. A DUCT OVERHEAT light causes the appropriate air mix valve to drive ___________ on a B737-700. ## Footnote **• full cold**

26. When a PACK TRIP OFF light illuminates, the pack valve ________ on the B737-700.

26. When a PACK TRIP OFF light illuminates, the pack valve ________ on the B737-700. ## Footnote **• automatically closes and the mix valve drives full cold**

27. In a B737-800, _______ if an amber ZONE TEMP light illuminates?

27. In a B737-800, _______ if an amber ZONE TEMP light illuminates? ## Footnote **• the MASTER CAUTION light will illuminate, and the trim air valve closes**

28. The recirculation fan system __________ the engine bleed air demand and air conditioning load.

28. The recirculation fan system __________ the engine bleed air demand and air conditioning load. ## Footnote **• reduces**

29. What does the TRIP RESET switch reset?

29. What does the TRIP RESET switch reset? **all answers are correct** * *• DUCT OVERHEAT on the B737-700, or the ZONE TEMP on the B737-800** * *• BLEED TRIP OFF, PACK TRIP OFF**

30. On the B737-800, what is indicated by the PACK light?

30. On the B737-800, what is indicated by the PACK light? ## Footnote **• a pack trip off or failure of both primary and standby pack controls**

31. Cabin air outflow controlled by\_\_\_\_\_\_.

31. Cabin air outflow controlled by\_\_\_\_\_\_. ## Footnote **• the outflow valve and the overboard exhaust valve**

32. On the Cabin Pressurization Panel, what does an illuminated amber AUTO FAIL light indicate?

32. On the Cabin Pressurization Panel, what does an illuminated amber AUTO FAIL light indicate? ## Footnote **• automatic pressurization system failure is detected**

33. Manually positioning the outflow valve to OPEN will cause cabin altitude to \_\_\_\_\_\_\_\_\_.

33. Manually positioning the outflow valve to OPEN will cause cabin altitude to \_\_\_\_\_\_\_\_\_. ## Footnote **• Climb**

34. The main outflow valve is the overboard exhaust exit for the majority of the air circulated through the passenger cabin and is actuated by one of _____ DC motors and

34. The main outflow valve is the overboard exhaust exit for the majority of the air circulated through the passenger cabin and is actuated by one of _____ DC motors and ## Footnote **• three**

35. On the cabin altitude panel, the \_\_\_\_\_\_\_\_on the CABIN Altimeter (ATL) / Differential Pressure (DIFF PRESS) Indicator indicates the cabin altitude in feet.

35. On the cabin altitude panel, the \_\_\_\_\_\_\_\_on the CABIN Altimeter (ATL) / Differential Pressure (DIFF PRESS) Indicator indicates the cabin altitude in feet. ## Footnote **• inner scale**

36. On the cabin altitude panel, the _______ on the CABIN Altimeter (ATL) / Differential Pressure (DIFF PRESS) Indicator indicates the differential pressure between cabin and ambient in psi.

36. On the cabin altitude panel, the _______ on the CABIN Altimeter (ATL) / Differential Pressure (DIFF PRESS) Indicator indicates the differential pressure between cabin and ambient in psi. ## Footnote **• outer scale**

37. The intermittent cabin altitude warning horn can be cut out \_\_\_\_\_\_.

37. The intermittent cabin altitude warning horn can be cut out \_\_\_\_\_\_. ## Footnote **• By pushing the Altitude (ATL) HORN CUTOUT Switch**

38. At _______ cabin altitude the intermittent cabin altitude warning will sound.

38. At _______ cabin altitude the intermittent cabin altitude warning will sound. ## Footnote **• 10,000 feet**

39. Cabin rate of climb displayed \_\_\_\_\_\_.

39. Cabin rate of climb displayed \_\_\_\_\_\_. ## Footnote **• on the cabin rate of climb indicator**

40. On the Cabin Pressurization Panel, \_\_\_\_\_\_\_modes automatically pressurize the aircraft.

40. On the Cabin Pressurization Panel, \_\_\_\_\_\_\_modes automatically pressurize the aircraft. ## Footnote **• AUTO & ALTN**

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21) xx. Does the APU bleed air valve, on the B737-800, automatically close when the APU is shut down?

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21) xx. In a B737-700, a PACK TRIP OFF is caused by \_\_\_\_\_\_\_\_\_.

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21) xx. In a B737-700, a PACK TRIP OFF is caused by \_\_\_\_\_\_\_\_\_. **pack temperatures exceeding limits**

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21) xx. The Wing-Body Overheat (OVHT) TEST switch \_\_\_\_\_\_\_\_\_\_\_\_\_.

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21) xx. In a B737-700, a PACK TRIP OFF is caused by \_\_\_\_\_\_\_\_\_. **all answers are correct** * **illuminates both WING-BODY OVERHEAT lights** * **tests wing-body overheat detector circuit**

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21) xx. On the Cabin Pressurization Panel, with the pressurization mode selector in the MAN mode, the outflow valve switch takes approximately _______ to move the outflow valve in the full range of motion.

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21) xx. Conditioned air for the cabin comes from \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21) xx. Conditioned air for the cabin comes from \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_. **either the aircraft air conditioning system or a preconditioned ground source**

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21) xx. What are the required immediate action items for a cabin altitude warning horn inflight? 1. **Oxygen Masks & Regulators…ON & 100%** 2. **Crew Communications…Establish** 3. **Seatbelt Sign….ON**

(NOTE: This question is not in SV Study Guide but does appear in the B737 Air Systems Quiz as of 2022/9/21) xx. On the Cabin Pressurization Panel, the MAN mode controls aircraft pressurization \_\_\_\_\_\_\_\_\_\_\_\_\_.