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B747 > Systems > Flashcards

Systems Flashcards

1
Q

What items are included in the Exterior Safety inspection?

A

Chocks, Landing Gear (door position), APU Fire Control Handle, Flight Control surfaces, APU exhaust area (unless APU running)

These items ensure the aircraft’s exterior is safe for operation.

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2
Q

What is the first step in the Electrical Power Up procedure?

A

BAT Switch ON

This step initiates the electrical power-up sequence for aircraft systems.

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3
Q

What should the STBY PWR selector be set to during the Electrical Power Up procedure?

A

AUTO

This setting allows for automatic selection of standby power.

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4
Q

What is the position of the HYD DEM Pump selectors during the Electrical Power Up procedure?

A

OFF

Keeping the hydraulic demand pumps off prevents unnecessary power usage.

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5
Q

What should the Windshield Wiper selectors be set to during the Electrical Power Up procedure?

A

OFF

This prevents wipers from operating when not needed.

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6
Q

What is the position of the ALT Flap selector during the Electrical Power Up procedure?

A

OFF

Ensures that alternate flaps are not activated unnecessarily.

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7
Q

What position should the Landing Gear Lever be in during the Electrical Power Up procedure?

A

Down

This indicates that the landing gear is in the safe position.

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8
Q

What does EEC stand for?

A

Electronic Engine Control

EEC is responsible for managing engine performance.

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9
Q

What does the EEC command regarding fuel flow?

A

Commands Fuel Metering Unit to adjust Fuel Flow

This adjustment is crucial for maintaining optimal engine performance.

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10
Q

When does the EEC command App Idle?

A

NAI ON, Flaps in Landing position, CONT Ignition ON

These conditions ensure the engine operates safely during landing.

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11
Q

How does the EEC set thrust?

A

By controlling N1 based on Thrust Lever position

N1 is the rotational speed of the engine’s low-pressure compressor.

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12
Q

What does the EEC keep constant independent of OAT and Px

A

Thrust
## Footnote

This feature helps maintain performance despite environmental changes.

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13
Q

What adjustments does the EEC make for?

A

Changes in NAI, WAI & airplane Bleed requirements

These adjustments are critical for engine efficiency and safety.

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14
Q

What does the EEC provide during climb?

A

A FIXED Thrust Lever position

This simplifies thrust management for pilots.

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15
Q

What type of protection does the EEC provide?

A

Overboost protection

This prevents engine damage from excessive thrust levels.

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16
Q

What is the source of power to the BAT Chargers?

A

Ground Service Bus

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17
Q

What is the main power source to the Ground Service Bus?

A

AC Bus 1

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18
Q

What is the purpose of the ‘Ground Service’ switch located next to the L1 Door?

A

To power the Ground Service Bus from the same source as the Ground Handling Bus when AC Bus 1 is not powered

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19
Q

What is the main source of power for the CA Xfer Bus?

A

AC Bus 3

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20
Q

What is the backup power source for the CA Xfer Bus?

A

AC Bus 1

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21
Q

What is the main source of power for the FO Xfer Bus?

A

AC Bus 2

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22
Q

What is the backup power source for the FO Xfer Bus?

A

AC Bus 1

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23
Q

When is the Ground Handling Bus powered?

A

On the ground, anytime APU 1 or EXT 1 is AVAIL or ON

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24
Q

What are some of the items on the Ground Handling Bus?

A
  • Lower Cargo Handling and Lights
  • Fueling system
  • AUX Hyd Demand Pump #4
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25
Q

When is the Main Deck Cargo handling Bus powered?

A

On the ground, anytime APU 2 or EXT 2 is AVAIL

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26
Q

What happens when you push a BTB switch?

A

Push OFF: opens the BTB & respective DCIR and resets Fault Logic circuitry.
Push AUTO: arms the automatic AC bus tie circuitry & closes DCIR

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27
Q

What items are powered in flight with loss of all Normal AC Power?

A

• Left FMC
• Left VHF Comm
• NAI
• Left PFD
• Primary EICAS
• Dome Lights
• Left ND
• CA Pitot Heat
• L & R interphone panels

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28
Q

Can I fly an ILS with loss of all Normal AC Power?

A

Yes, BUT no FD or A/P

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29
Q

Can I trim with loss of all Normal AC Power?

A

Yes, using Alternate switches (through a separate control channel)

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30
Q

Can I get the Gear & Flaps down with loss of all Normal AC Power?

A

Yes, the Gear through its normal Hydraulic mode and the TE Flaps through the Primary mode. The LE Flaps will NOT extend prompting a Flaps Drive message (25 Kt additive to VREF - QRH)

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31
Q

What about Reverse, Speedbrakes & Anti-Skid with loss of all Normal AC Power?

A

No Reverse, No Auto Speedbrakes (manual OK), and no Anti-Skid

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32
Q

When is the Main Deck Cargo handling Bus powered?

A

On the ground, anytime APU 2 or EXT 2 is AVAIL

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33
Q

What happens when you push a BTB switch?

A

Push OFF: opens the BTB & respective DCIR and resets Fault Logic circuitry.
Push AUTO: arms the automatic AC bus tie circuitry & closes DCIR

34
Q

What items are powered in flight with loss of all Normal AC Power?

A

Left FMC, Left VHF Comm, NAI, Left PFD, Primary EICAS, Dome Lights, Left ND, CA Pitot Heat, L & R interphone panels

35
Q

Can I fly an ILS with loss of all Normal AC Power?

A

Yes, BUT no FD or A/P

36
Q

Can I trim with loss of all Normal AC Power?

A

Yes, using Alternate switches (through a separate control channel)

37
Q

Can I get the Gear & Flaps down with loss of all Normal AC Power?

A

Yes, the Gear through its normal Hydraulic mode and the TE Flaps through the Primary mode. The LE Flaps will NOT extend prompting a Flaps Drive message (25 Kt additive to VREF - QRH)

38
Q

What about Reverse, Speedbrakes & Anti-Skid with loss of all Normal AC Power?

A

No Reverse, No Auto Speedbrakes (manual OK), and no Anti-Skid

39
Q

Where does the APU get its fuel?

A

AC available: Main Tank 2 / Pump 2 AFT
AC NOT available: Main Tank 2 / DC Pump

40
Q

How can I tell if the APU is running?

A

EICAS Status message ‘APU running’
APU Gens ‘AVAIL’ light
STAT page: line of APU info

41
Q

What does APU Gen ‘AVAIL’ light indicate?

A

APU Gen power acceptable

42
Q

Can I start the APU in flight?

A

NO

43
Q

Can the APU be operated in flight?

A

YES

44
Q

Can I use the APU Gens in flight?

A

NO

45
Q

With an APU fire light, what will automatically occur if the airplane is on the ground?

A

APU automatically shuts down and the APU extinguisher automatically discharges

46
Q

What are the main items powered by HYD SYS 1?

A

Nose & Body Gear steering & actuation, Inboard TE Flaps, Left Outboard Elevator, Alternate Brakes, Center A/P

47
Q

What are the main items powered by HYD SYS 2?

A

Stabilizer Trim, Elevator Feel, Alternate Brakes, Right A/P

48
Q

What are the main items powered by HYD SYS 3?

A

Stabilizer Trim, Elevator Feel, Left A/P

49
Q

What are the main items powered by HYD SYS 4?

A

Wing Gear actuation, Outboard TE Flaps, Primary Brakes, Right Outboard Elevator

50
Q

What powers #1 Demand Pump?

A

Air (faster)

51
Q

What powers #2 Demand Pump?

A

Elec (more torque)

52
Q

Is there a shutoff valve for the Demand Pump?

A

NO; a switch but no valve

53
Q

When do Demand Pumps 1 & 4 automatically operate?

A

Flaps in Transit or out of UP / respective Eng Driven pump output pressure low / respective Fuel Control switch in CUTOFF

54
Q

What will cause the HYD SYS Fault light to illuminate?

A

Low Hyd system pressure
Low Hyd reservoir qty
Excessive Hyd fluid temperature

55
Q

What will cause the Demand pump low PRESS light to illuminate?

A

Demand pump selector to OFF or AUX
Output pressure is low with pump operating
Demand pump fails to operate

56
Q

With loss of HYD SYS 4, how do you lower the Ldg Gear & Flaps?

A

ALTN Gear extend switches / Secondary mode (electrically)

57
Q

With the loss of HYD SYS 4 do you have Autobrakes? Anti-Skid?

A

NO / YES (in pairs only)

58
Q

What may cause the nose to pitch up on landing with loss of HYD SYS 4?

A

Rapid extension of Spoilers; Spoiler panels 5,6,7, & 8 (4 inboards) will not deploy on touchdown

59
Q

What is the difference between Normal & Alternate brake systems?

A

Normal brakes: Autobrakes available & individual wheel Antiskid protection
Alternate brakes: No Autobrakes & lateral wheel pairs Antiskid protection

60
Q

What are the indications of an engine fire?

A

Both Master Warning Lights, Engine Fire Light, Fuel Control switch Light, EICAS Fire MSG

61
Q

What will unlock a Fire switch?

A

Fire Warning, Fuel Control switch in CUTOFF, Override switch/button

62
Q

What happens when I pull a Fire switch?

A

Closes Engine & Spar fuel valves, Closes Engine Bleed valve, Trips Gen field, Shuts off HYD to EDP, Depressurizes the Demand pump, Arms both Fire extinguishers on the related wing

63
Q

How many Fire bottles are available to an engine?

A

Two on each wing

64
Q

What type of Fire detection do the engines have?

A

Dual loop (‘and’ system)

65
Q

Will I get a Fire warning for an Engine Overheat?

A

No, that would be an Overheat warning

66
Q

What type of detection do I have for a cargo fire?

A

Dual loops (‘and’ system); 4 loops in each Lower compartment, 16 in the Main (uses sample air from the center bleed duct)

67
Q

What happens when I push the MAIN DECK cargo fire ARM switch?

A

Enables Main Deck fire suppression
Turns off 2 Packs
Turns off all airflow to the Main Deck
Turns off all airflow & heat into the Lower Cargo compartments
Closes the master Trim Air Valve
Configures Equip Cooling to closed loop

68
Q

What happens when I push the FWD or AFT cargo fire ARM switch?

A

Turns off 2 Packs
Arms respective Lower Cargo compartment fire extinguishers
Turns off all airflow & heat into the Lower Cargo compartments
Closes the master Trim Air Valve
Configures Equip Cooling to override

69
Q

What happens when I push the cargo fire DEPRESS/DISCH switch if the MAIN DECK cargo fire arm switch is armed?

A

Initiates airplane depressurization to a cabin altitude of 25,000’

70
Q

What happens when I push the cargo fire DEPRESS/DISCH switch if the FWD or AFT cargo fire arm switch is armed?

A

Initiates extinguisher discharge sequence to provide effective agent concentration for 334 minutes (2 bottles discharge immediately and the other 4 discharge after a brief delay or upon touchdown)

71
Q

When is automatic CONT ignition provided?

A

Start with N2 < 50%

TE Flaps out of Up, NAI ON

72
Q

When must I use CONT ignition?

A

Heavy rain, Severe turbulence, Volcanic Ash, Icing conditions (if NAI or its auto feature is INOP)

73
Q

What is displayed on the Secondary EICAS display?

A

N2 rpm, Fuel Flow, Oil Pressure, Oil Temperature, Oil Quantity, Vibration

74
Q

Where would I read ‘X-BLD’ indication if it is recommended for inflight start?

A

On the N2

75
Q

What protection does AUTO START provide?

A

Hot start, Hung Start, No EGT

76
Q

What does AUTO START not protect?

A

No Oil pressure, No N1 rotation

77
Q

With AUTO START armed, what happens when I pull the start switch?

A

Arms the Start Valve, Opens the Engine (pylon) Bleed Air Valve

78
Q

What does the NORM selection mean on the STBY Ignition Selector?

A

Normal AC supplies power to the selected igniter

Stby Pwr supplies power to both igniters if AC power is lost

79
Q

What does 1 or 2 mean on Stby Ignition?

A

Stby Pwr system supplies power continuously to the respective igniter

80
Q

Pressing the CONT Ignition switch to ON does what?

A

Selected igniter operates continuously, Approach Idle minimum is commanded

81
Q

When does the selected engine igniter operate?

A

Start switch out, NAI ON, Flameout detected

B747 (1 decks)

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