2-AIR COND Flashcards

1
Q

If PACK FLOW is selected to LO, NORM or HIGH and only the APU is providing BLEED AIR or one pack is selected OFF, what will the packs provide?

A

HIGH flow rate, since the flow rate function is automatic.

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2
Q

If the HOT AIR valve faults, what will happen to the temperature control system?

A

All trim air valves close and PACK 1 controls the cockpit temperature to the selected value. PACK 2 controls the cabin to the averages selected by the FWD and AFT CABIN temperature selector knobs.

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3
Q

How are the PACKS controlled and operated?

A

Electrically controlled and pneumatically operated.

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4
Q

What are some potential causes for a PACK FAULT light?

A
  • Valve position disagrees with selected
  • Compressor outlet overheat
  • Pack outlet overheat
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5
Q

What are some potential causes for ENG BLEED FAULT light?

A
  • Bleed overpressure
  • Bleed overheat
  • Wing or engine leak on the related side
  • Bleed valve NOT closed during engine start
  • Bleed valve NOT closed with the APU BLEED ON
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6
Q

What is the logic for the X-BLEED rotary selector?

A
  • SHUT = the valve is closed.
  • AUTO = open if the APU bleed valve is open; closed if APU bleed valve is closed or there is a wing, pylon or APU leak (except during an engine start).
  • OPEN = the valve is open.
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7
Q

What does APU BLEED FAULT illumination indicate?

A
  • APU bleed leak.
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8
Q

What does selecting the RAM AIR pushbutton accomplish?

A
  • Ram air inlet opens if the differential pressure is less than 1 PSI.
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9
Q

What is the RAM AIR pushbutton used for?

A
  • Smoke/fumes removal in cabin
  • Ventilation of cabin with a dual pack failure
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10
Q

How is the Bleed leak detection different on CEO and NEO aircraft?

A
  • If a Bleed Air Monitoring Computer (BMC) fails on NEO airplane, over temperature protection is lost on the affected side. Has no effect on CEO.
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11
Q

When should you select LO pack flow?

A
  • On 319, when passengers is below 138.
  • On 320, when passengers is below 141 (+3).
  • On 321, when passengers is below 168 (+30), select ECON FLOW on
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