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Delta Air Lines 7ER > Air Systems > Flashcards

Air Systems Flashcards

1
Q

Describe the function of the Compartment Temperature (COMPT TEMP) controls and indicators.

A

Compartment Temperature selectors
• AUTO – Provides automatic compartment temperature control.
• OFF – Closes the associated compartment trim air valve and illuminates the compartment temperature INOP light.

Note: The INOP light also illuminates for a fault in the associated zone
temperature controller.

(767 only) Flight Deck (FLT DK) Manual (MAN) control:
• MAN –
- Provides manual control of the compartment trim air valve.
- The selector is spring loaded to the 6 o’clock position while in
manual.

Note: Selecting the MAN position does not illuminate the compartment
temperature INOP light. (Control is still available)

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2
Q

Recall the meaning of a Left or Right Engine (L/R ENG) bleed OFF light.

A

Engine Bleed Air OFF lights

• Illuminated (amber) – engine bleed air valve is closed:

  • Closes automatically due to a system fault
  • Closed if the switch is OFF
  • Closed if the engine is not operating.
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3
Q

Recall the indications of a dual auto pressurization controller failure.

A

AUTO Inoperative (INOP) light Illuminated (amber) –

• AUTO 1 and AUTO 2 CABIN ALTITUDE CONTROL mode
selector (MODE SELECT) functions are inoperative

• MAN mode selected

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4
Q

Recall the meaning of the Cargo Heat Overheat (OVHT) light. (767 Only)

A

Cargo Heat Overheat (OVHT) lights illuminated (amber) –

  • The cargo compartment temperature is above the standard control range
  • The shutoff valve has been signaled closed.
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5
Q

Describe the function of the trim air system.

A
  • The trim air control system adds warm air to the pack output air.
  • The pack controllers regulate the pack output air temperature to satisfy the temperature requirement of the compartment requiring the coolest air.
  • If the TRIM AIR switch is OFF or the trim air system is inoperative, the packs attempt to maintain all compartments at an average temperature.

TRIM AIR switch
• ON – the trim air valve is commanded open.
• Off (ON not visible) – the trim air valve is commanded closed.

TRIM AIR OFF light
• Illuminated (amber) – the TRIM AIR switch is off.

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6
Q

Describe the function of the gasper system.

A

Gasper System (as installed)

• The gasper system draws air from the forward cabin overhead air conditioning ducts and discharges it from gasper outlets in the passenger service units located above each passenger seat.

Note:
The 757 has no flight deck control for the gasper system.
The 767 has a flight deck switch to control the gasper system.

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7
Q

Recall the pressurization panel landing altitude (LDG ALT) must be__________________during a diversion.

A

Reset in the indicator

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8
Q

Discuss the purpose of the recirculation fans.

A

The recirculation fans maintain overall cabin air circulation while allowing a reduction of cabin air ventilation, permitting the packs to be operated at a reduced flow. This reduces bleed air demand from the engines, reducing fuel burn.

Note: On the 757 only, the Left Recirculation Fan (L RECIRC FAN) switch should not be turned off because of its equipment cooling function.

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9
Q

Explain how to manually control the cabin altitude.

A
  • Position the cabin altitude mode selector (MODE SELECT) to manual (MAN)
  • Move the cabin altitude MANUAL control to CLIMB or DESCEND as needed to control the cabin rate and altitude.
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10
Q

Recall the location, functions and preflight position of the BULK CARGO HEAT selector (767 Only).

A

BULK CARGO HEAT selector

  • The BULK CARGO HEAT selector is located on the P-61 accessory panel
  • Normal (NORM) - standard cargo heating range.
  • Ventilation (VENT) - requests a higher temperature control range than NORM and turns on a ventilating fan for the bulk cargo compartment .

Note: The preflight position for all Delta operations is VENT

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11
Q

Recall the functions of the equipment cooling selector positions (767 Only):

A

Equipment Cooling (EQUIP COOLING) selector

  • Automatic (AUTO) – automatically controls the equipment cooling system.
  • Standby (STBY) – positions the equipment cooling system for inboard air flow.
  • Override (OVRD) – positions the equipment cooling system for reverse air flow and arms the NO COOLING light.
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12
Q

Explain the meaning of a PACK OFF light.

A

PACK OFF lights

Illuminated (amber) –.The pack valve is closed.

Note: The Pack is OFF.

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13
Q

Explain the meaning of a PACK Inoperative (INOP) light.

A

Pack Inoperative (INOP) lights

Illuminated (amber) –
• A pack outlet overheat has been detected
• A fault in the automatic control system has been detected.

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14
Q

) Explain the meaning of an illuminated GASPER OFF light. (767 only and as installed)

A

Gasper Fan OFF light

• Illuminated (amber) – the GASPER fan switch is ON but the fan is not operating.

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15
Q

Explain the meaning of an illuminated Recirculation Fan (RECIRC FAN) INOP light.

A

Recirculation Fan Inoperative (INOP) lights

• Illuminated (amber) –

  • The recirculation fan is failed or is not operating.
  • The RECIRC FAN switch is off.
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16
Q

Explain the meaning of an illuminated Equipment Cooling (EQUIP COOLING) OVHT light on both the 757 and 767.

A

(757) Equipment Cooling Overheat (OVHT) light
• Illuminated (amber) – insufficient airflow due to:
- Insufficient airflow during ground operations
- The supply fan is inoperative, or
- The alternate supply fan is inoperative

(767) Equipment Cooling Overheat (OVHT) light
• Illuminated (amber) – high temperature or low airflow in the equipment cooling system.

17
Q

Explain the function of the OFF, AUTO and STBY positions of the pack control selectors.

A

PACK Control selectors
• OFF – closes the pack valve.
• AUTO – the pack is automatically controlled.
• STBY –
- N (normal) – regulates the pack outlet temperature to a constant, moderate temperature.
- C (cool) – sets the pack to full cold operation.
- W (warm) – sets the pack to full warm operation.
Note: The automatic controller is bypassed in the standby position.

18
Q

Explain the meaning of an illuminated CABIN ALTITUDE light on the overhead panel and an illuminated CABIN ALT light on the center forward (discrete) panel.

A

Cabin Altitude light
• Illuminated (red) –
- The cabin altitude has exceeded 10,000 feet
- The light extinguishes when the cabin altitude descends below 8,500 feet.

19
Q

Explain the operation of the cabin altitude AUTO RATE control

A

Cabin Altitude AUTO RATE control
• Functions only if AUTO 1 or AUTO 2 is selected
• Rotate – sets the limit for cabin altitude rate of climb or descent during auto control
• The index mark is the proper preflight position

20
Q

Explain the meaning of an illuminated NO COOLING light on the EQUIP COOLING panel (767 Only)

A

NO COOLING light
• Illuminated (amber) –
- Active in the OVRD position only
- No reverse air flow through the E/E compartment avionics

21
Q

Recall the meaning of an illuminated compartment temperature INOP light.

A

Compartment Temperature Inoperative (INOP) lights
• Illuminated (amber):
- The compartment temperature control is selected OFF
or
- A fault has occurred in the zone temperature controller while operating in AUTO
or
-The TRIM AIR switch is selected OFF.

Note: Selecting the TRIM AIR switch OFF will cause all compartment temperature INOP lights to illuminate.

22
Q

Explain why the center isolation (C ISLN) switch is guarded. (767 Only)

A

To protect the air source to the ADP.

23
Q

Recall the meaning of an illuminated DUCT LEAK light.

A

DUCT LEAK lights

• Illuminated (amber) – a high temperature bleed air leak is detected

24
Q

Recall the meaning of an illuminated Engine BLEED light.

A

Engine BLEED lights
• “Bleed Air Malfunction” is the Delta recommended answer.
• The Volume II detailed answers are also acceptable.

25
Q

Recall the meaning of an illuminated Engine HI STAGE / OVHT light.

A

Engine HIGH STAGE / OVHT lights
• “Bleed Air Malfunction” is the Delta recommended answer.
• The Volume II detailed answers are also acceptable.

Delta Air Lines 7ER (17 decks)

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