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From Flashcardlet > FCOM VOL2 Engines, APU. > Flashcards

FCOM VOL2 Engines, APU. Flashcards

0
Q

What does the A/T LIM mean on the thrust mode annunciation?

A

FMC is not providing the A/T system with n1 limit values, the A/T is using degraded N1 thrust limit from the related EEC.

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1
Q

On the thrust mode display what is indicated by long dash short dash, – -?

A

FMC is not computing thrust limit.

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2
Q

Amber thrust reverser indication on upper du?

A

Thrust reverser is moved from stowed position.

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3
Q

Green thrust reverser indication?

A

Thrust reverser is deployed.

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4
Q

What is indicated by a Amber thermal anti ice indication?

A

The cowl anti ice valve is not in the position indicated by the switch.

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5
Q

Amber bands on EGT gauges?

A

Max continuos EGT limit.

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6
Q

What is the red line on start up on EGT gauge indicate?

A

Max EGT during start. Approx 59%N2.

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7
Q

What happens to the EGT readout when temp goes into max continuous range?

A

Read out turns Amber.

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8
Q

When is the Amber EGT readout inhibited?

A

For 5mins on t/o or G/A normal ops.

For 10mins on t/o or G/A in single engine scenario.

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9
Q

What is indicated by red EGT readout?

A

Maximum t/o or start EGT limit exceeded.

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10
Q

If the EGT readout so are blinking white, what does this indicate?

A

The EEC’s senses conditions that may lead to a hot start or stall during ground start.
Current EEC’s cut fuel automatically for an impending hot start or stall condition.

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11
Q

On the EGT gauge when will the Amber ENG FAIL annunciation?

A

When N2 drops below sustainable idle thrust, approx 50% N2.

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12
Q

When will the ENG FAIL alert extinguish?

A

When engine recovers, when start lever is cutoff or when fire switch is pulled.

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13
Q

What does the start valve open alert mean?

A

Start valve is open and air is supplied to starter.

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14
Q

What does a blinking start valve open mean?

A

I commanded opening of the start valve. Alert is displayed and solid Amber boxes in unannunciated positions for that engine. All 3 boxes for that engine blink for 10secs then alert remains on steady and solid Amber boxes are removed.

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15
Q

Amber low oil pressure alert?

A 
Solid = oil pressure at or below red line.
Blinking= with a low oil pressure condition, alert is displayed and solid Amber boxes in un annunciated positions for that engine flash for 10secs before alert remains on and solid Amber boxes extinguish.
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16
Q

Oil filter bypass alert?

A 
Steady = indicates an impending bypass of the scavenge oil filter.
Blinking= with impending bypass, alert is displayed and solid Amber boxes in unannunciated positions for that engine blink for 10secs before alert remains and solid Amber boxes extinguish.
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17
Q

When is the start valve open, oil pressure low and oil filter bypass alert inhibited?

A

On T/O, from 80kts to 400ft agl, or 80kts plus 30seconds whichever occurs 1st.
On landing, from 200ft agl until 30seconds after touch down.
During times when blinking is inhibited and alert is steady.

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18
Q

When are the secondary instruments displayed?

A

When CDS initially receives power,
When selected on the multi-function display,
In flight when the engine start lever is moved to cutoff,
In flight when engine fails,
When secondary engine parameter exceeds normal operating range.

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19
Q

What does the magenta X-bld indicate?

A

A cross bleed start is recommended. Displayed when airspeed is less than reqd for a windmilling start.

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20
Q

What happens when engine start lever is moved to GRD?

A

Open start valve, closes engine bleed valve, for ground starts arms selected igniter/s to provide ignition when start lever is moved to idle, inflight arms both igniters to provide ignition when start lever is moved to idle. Releases to auto at start valve cutout.

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21
Q

When does the auto provide ignition to both igniters on start switch?

A

Ignition normally off.
Both igniters are activated when engine start lever is in idle and,
An uncommanded rapid decrease in N2 occurs or,
N2 is between 57% and 50% or
Inflight and N2 is between ladle and 5%

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22
Q

When does start switch activate automatic ignition with start switch in auto, ops normal?

A

Engine is running and, when flaps not up below 18000ft, and or engine anti-ice is on.

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23
Q

What does cont do on start switch?

A

Provides ignition to selected igniter when engine is running and start lever is in idle.
Provides ignition to both igniters when N2 is below ldle and engine start lever is in idle.

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24
Q

What does FLT do on engine start switch?

A

Provides ignition to both igniters with engine start lever in idle.

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25
Q

Amber reverser lights indicate?

A

Indicates isolation valve or reverser control valve not in commanded postion,
One or more reverser sleeves is not in commanded state,
Auto Restow circuit has been activated
A failure has been detected in the synchronisation shaft lock circuit.

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26
Q

What activates ether engine control lights?

A

Engine control system is not dispatch able due to faults in the system.
Light operates when: engine is running, airplane on the ground, on t/o up until 80kts or until approx 30secs after touchdown on ldg.

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27
Q

What is indicated by the EEC’s showing the white on?

Normal config.

A

Inmates normal control mode is selected,
Engine ratings calculated from sensed atmospheric conditions and bleed air demand,
When the ON is not in view, the EEC has manually been selected to alternate mode.

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28
Q

What does it mean when EEC’s have the Amber alternate in view?

A

Indicates the EEC has automatically switched to alternate control mode or has been manually switched to alternate control mode,
EEC provides rated thrust or higher.

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29
Q

What is indicated by the EEC’s showing both white ON and Amber ALTN.

A

EEC has automatically switched to soft alternate mode.

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30
Q

Which engine parameter limits must be observed in both normal and alternate control modes.

A

EGT limits not protected.

31
Q

What does moving the engine start levers to idle do?

A

Energises the ignition system through the EEC, electrically opens the spar fuel shutoff valve in the wing leading edge outboard of the pylon,
Electrically opens the engine mounted fuel shutoff valve via the EEC.

32
Q

What does moving the engine start lever to cutoff do?

A

Closes both spar and engine-mounted fuel valves,

De-energises the ignition system.

33
Q

On APU panel what does blue MAINT light indicate?

A

APU has a maintenance problem.
APU may be operated,
Light is disarmed when APU is switched off.

34
Q

After shutdown of APU how long does EGT gauge remain powered?

A

5mins.

35
Q

What does Amber over speed on APU panel indicate?

A

APU rpm limit has been exceeded resulting in automatic shutdown of APU.
Over speed protection feature has failed a self test during a normal shutdown of APU.

36
Q

If the over speed light is illuminated when the APU is switched off how long will the light remain on for?

A

5mins,

Light is disarmed when the APU switch is in the off position.

37
Q

APU fault light indicates what?

A

A malfunction exists resulting in automatic shutdown,
If light is illuminated when APU is switched off it will extinguish after 5mins.
Light is disarmed with APU switch off.

38
Q

When will the APU low oil pressure light illuminate?

A

During start sequence.
When APU oil pressure is low resulting in an automatic shutdown of APU.
If light is illuminated when APU is switched off light will extinguish after 5 mins.
Light is disarmed with APU switched off.

39
Q

What happens when APU is switched off?

A

With APU running it trips the APU generator off the bus/es if connected and closes the APU bleed air valve.
APU continues to run for 60second cooling period.
APU inlet door automatically closes once APU is shutdown.

40
Q

Describe the engines?

A

CFM56-7 dual rotor axial flow turbofan engine

41
Q

What does the N1 rotor consist of?

A

Low pressure compressor and low pressure turbine.

42
Q

What does the N2 rotor consist of?

A

High pressure compressor and high pressure turbine.

43
Q

Which rotor drives the engine driven gearboxes and bleed air starter motor?

A

Both connected to the N2 rotor.

44
Q

What is the danger of pushing thrust levers full forward with the EEC’s operating in alternate mode? Is it ok to do this?

A

There’s a chance of over boosting engines. Only considered necessary in emergency situations when ground contact is imminent.

45
Q

When is the secondary engine display automatically displayed?

A

When the displays initially receive power,
In flight when engine start lever is moved to cutoff,
In flight when engine N2rpm is below idle,
A secondary engine parameter is exceeded.

46
Q

During battery start what are the only indications showing?

When do the rest of the engine indications appear?

A

N1, N2, oil quantity.

When N2 accelerates above 15% EEC becomes energised and show rest of engine indication.

47
Q

How is equal use of the EEC channels carried out?

A

During each engine start the EEC alternates channels.

48
Q

How does EEC normal mode work?

A

EEC uses sensed flight conditions and bleed air demand to calculate n1 thrust settings, it compares actual N1 with commanded n1 to adjust fuel flow to achieve the commanded n1.

49
Q

What causes the EEC’s to automatically switch to soft alternate mode?
How is this annunciated?

A

Loss of the reqd signals for normal mode.

Amber ALTN and White ON.

50
Q

How does EEC calculate thrust settings in soft alternate mode?
What are the dangers of soft alternate mode?

A

EEC’s use Last valid flight conditions, resulting in no immediate thrust changes.
Danger is when you fly into different flight conditions resulting in either a thrust shortfall or exceedance.

51
Q

How is hard alternate entered?

A

Retarding the thrust lever to idle or pushing the EEC button.

52
Q

Which engine parameters are protected from redline over speed in both normal and alternate modes?

A

N1 & N2

53
Q

At same airspeed and altitude will flight idle or approach idle have higher n1 &n2?

A

Approach idle.

54
Q

In flight if a fault prevents the EEC from receiving signals from the flaps or engine anti ice when will approach idle begin?

A

15000ft.

55
Q

Describe how fuel is delivered to the engine?

A

Delivered to spar fuel valve under pressure from tank fuel pumps, pressure increased as it passes through 1st stage engine fuel pump, 2x oil/ fuel heat exchangers, fuel filter, more pressure from 2nd stage engine boost pump before entering HMU(hydro mechanical unit). Which to meet thrust reqmnts EEC’s meter fuel through HMU.

56
Q

What will occur first fuel actual bypassing filter or the Amber fuel filter bypass warning?

A

The Amber fuel filter bypass warning?

57
Q

Where is engine fuel flow measured?

A

After the engine fuel shutoff valve.

58
Q

Where are the sensors for oil temp and low oil pressure located?

A

Downstream of the oil pump prior to engine lubrication.

59
Q

What will occur 1st oil bypassing the filter or the the oil filter bypass warning?

A

The oil filter bypass warning.

60
Q

What cockpit indications will you see during a impending hot stat?

A

If there isEither a rapid rise in EGT or EGT approaching start limit, or a compressor stall, the white box surrounding the EGT readout flashes white.
This is reset when start lever is moved to cutoff or when N2 reaches idle. Ignition should automatically turn off and fuel shut off.

61
Q

What happens if EGT exceeds start limit?

A

Both dial and gauge turn red, EEC automatically turns off ignition and shuts off fuel.

62
Q

What is a wet start?

When will the EEC terminate the start?

A

Wet start is when the EGT fails to rise after start lever is placed in idle, EEC will turn off ignition and shot off fuel 15seconds after start lever was put into idle.

63
Q

Which igniter runs off the AC standby bus?

A

The right igniter.

The left runs off associated transfer bus.

64
Q

What happens when the EEC’s detect a flameout?

A

Both igniters are activated for flame out protection.

65
Q

What are the two methods of inflight starting?

What is the difference in protection for air start and ground start?

A

Cross bleed start and wind mill start.

No start protection for inflight starts.

66
Q

When can reverse thrust be deployed?

A

When radio alt is below 10ft or air/ground sensor senses on ground.
Forward thrust levers must be fully closed.

67
Q

What happens when reverse thrust is selected?

A

Electromechanical lock is released, isolation valve opens and the thrust reverser control valve moves to the deploy position, allowing hydraulic pressure to unlock and deploy the reverser system.

68
Q

With the reverser in detent 1 how long a pause before the electromechanical lock will prevent further movement of the reverser sleeves?
How could this be fixed?

A

18seconds,

Cycling reverse thrust levers.

69
Q

What does the APU require to operate?

A

APU fire switch on the overheat/fire panel must be IN.
APU fire control handle on the ground control panel must be IN.
Battery switch must be on.

70
Q

Where does the power to start the APU come from?

A

No1 transfer bus or battery.

71
Q

Why does switching the battery off automatically shut down the APU?

A

Because of power loss to the electronic control unit.

72
Q

How long can the start cycle of the APU take?

A

Up to 120secs.

73
Q

What light will illuminate if the APU fails to start or the APU gen off bus light fails to illuminate?

A

Apu FAULT light.

74
Q

When will the “eng fail” alert illuminate on the EGT gauge?

A

With N2 below 50% and engine start lever in idle.

75
Q

When will the secondary instruments display?

A

When CDS initially receives power
When selected on MFD
When engine fails
Inflight with engine start lever is moved to cutoff
When secondary indication exceeds a limit

76
Q

What causes delay in being able to select reverse from idle position?

A

Sleeve must be 60% deployed.

From Flashcardlet (20 decks)

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