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Air Conditioning Panel Flashcards

(23 cards)

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1
Q

AIR CONDITIONING PANEL

Q:​ The​ pneumatic system is​ monitored and controlled​ by?​ ​

A

Ref: (FOM VOL. III-DSC-36-10-10)​ ​

2 Bleed​ Monitoring Computers​ (BMC)​

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2
Q

AIR CONDITIONING PANEL

Q:​ If​ one BMC fails,​ can​ the other​ take over?​ ​

A

Ref: (FOM VOL. III-DSC-36-10-20,​ FOM​ VOL.​ III-DSC-36-10-60)​ ​

Yes,​ they are interconnected.​ If​ BMC 1​ fails:​ ​

  • APU​ and​ ENG 1​ leak detection are​ not​ monitored ​
  • ECAM APU​ BLEED​ LEAK warning is​ lost​
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3
Q

AIR CONDITIONING PANEL

Q:​ The​ PACK​ FLOW selector​ has LO, NORM, and HI​ positions​ (A319/320). What does this allow us​ to do?​ ​

A

Ref: (FOM VOL. III-DSC-21-10-50)​ ​

Select​ pack​ flow rates​ representing LO 80%,​ NORM 100%,​ and HIGH​ 120% of​ NORM​

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4
Q

AIR CONDITIONING PANEL

Q:​ What flow rate​ is automatically​ selected when APU​ bleed air is in use​ or during single​ pack​ operation?​ ​

A

Ref: (FOM VOL. III-DSC-21-10-50)​ ​

Hi​

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5
Q

AIR CONDITIONING PANEL

Q:​ When should the​ PACK FLOW selector not​ be​ in the​ normal​ position?​ ​

A

Ref: (FOM VOL. II, Section​ 3.05) ​

IF​ A/C 201-299,​ 301-399, AND 910-999​ (A319/320):​ ​

  • LO: If the number of passengers is below 115.​ ​
  • NORM: For normal operating conditions. ​
  • HI: For abnormally hot and/or humid​ conditions.​

​IF​ A/C 701​ –​ 799​ (A321):​ ​

  • ON: For ECON flow if the number of​ passengers is below​ 140. ​
  • OFF:​ ​For normal flow.​
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6
Q

AIR CONDITIONING PANEL

Q:​ If​ the​ engine​ bleed air in-flight is too low what will​ occur?​ ​

A

Ref: (FOM VOL. III-DSC-21-20-30)​ ​

Minimum idle​ engine​ speed is automatically​ increased​ to provide​ adequate​ bleed air pressure​

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7
Q

AIR CONDITIONING PANEL

Q:​ What would cause an amber FAULT​ light to illuminate in the​ PACK​ 1​ and/or Pack​ 2​ pushbutton (OOD)? ​

A

Ref: (FOM VOL. III-DSC-21-10-50)​

  • Overheat - Pack​ outlet​ ​
  • Overheat - Compressor​ outlet​ ​
  • Disagreement - Switch position disagreement​ with pack​ flow​ control​ valve ​

Note: FAULT​ light will​ be​ illuminated​ when no bleed air​ is​ supplied

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8
Q

AIR CONDITIONING PANEL

Q:​ What does​ the​ amber​ FAULT​ light in the​ APU​ BLEED pushbutton​ indicate?​ STOP HERE ​

A

Ref: (FOM VOL. III-DSC-36-20) ​

Bleed​ leak​ (APU​ bleed​ valve​ closes)​

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9
Q

AIR CONDITIONING PANEL

Q:​ What causes the​ amber FAULT light on​ the​ ENG 1​ BLEED and/or ENG​ 2​ BLEED​ pushbutton​ (OOLD)?​ ​

A

Ref: (FOM VOL.​ III-DSC-36-20) ​

  • Overpressure​ - Downstream of​ the​ bleed​ valve​ ​
  • Overheat​ ​
  • Leak​ - Low pressure ​
  • Disagreement - APU​ bleed valve open and​ engine​ bleed valve​ not closed​ or​ ​
  • Engine​ Start with​ bleed valve​ not closed
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10
Q

AIR CONDITIONING PANEL

Q:​ What are​ the​ two​ functions​ of​ the​ engine​ bleed valves? ​

A

Ref: (FOM VOL. III-DSC-36-10-20)​ ​

To Act as:​ ​

  • Pressure​ regulation ​
  • Shut off​ valves
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11
Q

AIR CONDITIONING PANEL

Q:​ At what​ cabin differential pressure​ does​ the​ RAM AIR valve​ open?​ ​

A

Ref: (FOM VOL. III-DSC-21-10-20)​ ​

ΔP less​ than 1​ PSI​

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12
Q

AIR CONDITIONING PANEL

Q:​ What logic controls​ the​ X-Bleed valve​ when the​ X-BLEED switch is in​ AUTO?​ ​

A

Ref: (FOM VOL. III-DSC-36-10-40)​ ​

  • When APU bleed valve​ is OPEN,​ the​ X-Bleed valve​ is open​ ​
  • When APU bleed valve​ is CLOSED,​ the X-Bleed valve​ is​ closed​
  • X-Bleed​ also CLOSES for wing,​ pylon,​ or​ APU​ duct leak​ (except during​ engine​ start)
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13
Q

AIR CONDITIONING PANEL

Q:​ What causes the​ Pack Flow Control valve​ to automatically close?​ ​

A

Ref: (FOM VOL. III-DSC-21-10-50)​ ​

  • Upstream pressure below​ minimum​ ​
  • Pack overheat​ ​
  • Engine​ start​ sequence ​
  • Engine​ FIRE​ pushbutton on the​ related side​ pressed​ ​
  • DITCHING​ pushbutton​ is​ selected​
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14
Q

AIR CONDITIONING PANEL

Q:​ What does​ an​ amber FAULT light in the​ HOT​ AIR​ pushbutton indicate?​ ​

A

Ref: (FOM VOL. III-DSC-21-10-50)​ ​

Duct overheat - the​ Hot Air​ and Trim Air valves​ close​ automatically​

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15
Q

AIR CONDITIONING PANEL

Q:​ How many​ Air Conditioning System Controllers are​ there?​ ​

A

Ref: (FOM VOL. III-DSC-21-10-10)​ ​

2.​ Each Air Conditioning System Controller has 2 lanes​ –​ (Active/Standby)

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16
Q

AIR CONDITIONING PANEL

Q:​ Describe​ how the​ Air Conditioning System Controllers​ regulate​ temperature?​

Study These Flashcards
A

Ref: (FOM VOL. III-DSC-21-10-30)​ ​

  • Basic temperature​ regulation: Both packs​ produce​ the required​ outlet temperature​ determined ​by​ the​ lowest demanded zone​ temperature.
  • Optimized​ temperature regulation: Hot air is​ added​ to​ the​ individual zones​ by​ the​ trim air valves ​to maintain the​ desired zone​ temperatures.
17
Q

AIR CONDITIONING PANEL

Q:​ What occurs​ when an​ active​ lane​ of​ an Air​ Conditioning System Controller​ fails?​ ​

Study These Flashcards
A

Ref: (FOM VOL. III-DSC-21-10-40)​ ​

The​ second​ lane​ takes over​

18
Q

AIR CONDITIONING PANEL

Q:​ What occurs​ when both lanes​ of​ an​ Air Conditioning​ System Controller fails?​ ​

Study These Flashcards
A

Ref: (FOM VOL. III-DSC-21-10-40)​ ​

The​ related pack​ is​ lost.​ The​ hot air pressure regulating valve​ and associated trim​ air valve(s)​ ​close.

19
Q

AIR CONDITIONING PANEL

Q:​ How does​ the​ Air Conditioning System Controller​ configure​ its associated pack​ ram air inlet flap for ​takeoff​ and landing to​ avoid the ingestion of​ foreign matter?​ ​

Study These Flashcards
A

Ref: (FOM VOL. III-DSC-21-10-30) ​

Takeoff:​

  • Pack​ Ram Air Inlet Flap​ closes​ when​ takeoff power is​ set and​ the​ main landing gear​ ​struts​ are​ compressed. ​
  • Reopens after main landing​ gear​ strut extension​ ​

Landing:​

  • Pack​ Ram​ Air Inlet Flap closes as​ soon as the​ main landing​ gear struts​ are​ compressed​ ​and speed ≥ 70​ knots. ​ ​
  • Opens 20​ seconds after speed < 70​ knots​
20
Q

AIR CONDITIONING PANEL

Q:​ If​ an​ air cycle​ machine​ (ACM) fails, what​ occurs?​ ​

Study These Flashcards
A

Ref: (FOM VOL. III-DSC-21-20-40)​ ​

The​ affected​ pack​ will operate as a heat exchanger​

21
Q

AIR CONDITIONING PANEL

Q:​ What effect will​ the​ engine​ start sequence​ have​ on the​ pack flow control valves?​ ​

Study These Flashcards
A

Ref: (FOM VOL. III-DSC-21-10-20)​

The​ pack​ flow control valve will​ close​ automatically​

22
Q

AIR CONDITIONING PANEL

Q:​ After engine​ start with the​ APU​ BLEED pushbutton​ ON,​ what source​ is​ supplying bleed air to the​ ​packs? ​

Study These Flashcards
A

Ref: (FOM VOL. III-DSC-36-10-20)​ ​

APU​ Bleed​

23
Q

AIR CONDITIONING PANEL

Q:​ When does​ the Lav/Galley​ Extract​ Fan operate?​ ​

Study These Flashcards
A

Ref: (FOM VOL. III-DSC-21-30-50)​ ​

Continuously​ when electrical​ power​ is available​

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