Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Crj 900 > Powerplant > Flashcards

Powerplant Flashcards

0
Q

Battery start Consideration on the ground?

A

If ignition A is picked by the FADEC, it will not be powered( AC ess bus)….

After 15 seconds FADEC SWITCHES TO ignition B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
1
Q

Ign A

ign B. what buses….

A

Ign A…. AC essential bus

Ign B …. Bat bus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

FADEC means?

A

Full authority digital engine control

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Engine failure detected?

A

N1 speed less than 15% of the set pwr

Recovers when w/i 13 %

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Armed for TO?

A

N1 on BOTH engines within 8% of take off N1 reference

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

N1 less than 15 % of set pwr on an engine?

A

Engine failure detected

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Apr armed for g/a?

A

Appch bit met

Gear down

  Or

Flaps greater than 20

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

N1 both engines w/i 8% of takeoff N1 ref?

A

APR armed for T/O

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Operability valve?

A

Releases excess air pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What provides hydraulics for. Operability Valve and Statir vanes?

A

Pressurized fuel … Provides hydraulics for operability valve and stator vanes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Test

DC pwr AND pneumatics needed for start

A

DC pwr AND pneumatics needed for start

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

FADEC system pwrd by

Abv 50%

Blo 50%

A

Abv 50%. … Gearbox mounted fadec alternator

Blo 50% … Aircraft electrical system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What drives the accessory gearbox

A

N2 Compressor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

accessory gearbox items

A

3 fluids -engine oil lube pump

         - hydraulic pump
         - engine fuel pump

2 electric-FADEC
-IDGs

1 AIR..- ATS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

How is the operability valve controlled

A

By the FADEC

Hydraulically actuated by HP fuel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

IGN B … Bus?

A

DC Battery bus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Compressor stall prevented in 2 ways?

A

Operability valve

VG ( fuel adjusts the stator vanes)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Apr activates when?

A

Mismatch of 15%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

APR PWR INCREASES?

A

Toga …. APR

CLIMB … MCT

CRUISE .. Proportional increase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Apr armed?

Takeoff?

Landing?

A

Takeoff.. N1 both engines within 8% of reference value

Landing… Appch bit met
Ldg gear down or
Flaps greater 20

( either eng avail)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Normal takeoff thrust setting

A

13600

14500 w/apr

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

What enables N1 sync

A

Rt eng. N1 must be within 1.5% of the left engine N1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

N2 synch is enabled when?

A

Rt engine N2 is within 2.5% of the left engine N2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

FADEC overspeed protection?

A

N2 greater than 107%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

Starter cut out

A

50%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

Ignition a powered by

Ignition b powered by

A

Ignition A … AC ESS BUS

Ignition B … Batt bus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

If ignitor fails

A

After 15 seconds it switches

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

Cruise power?

A

Proportional increase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

Max power detent??

A

APR on both engines

ALSO GREEN SWITCHLIGHT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

APR .. TL’s in detent

A

CLB …… MCT

TOGA… APR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

Fuel pressure is used to manipulate what valve to dump excessive air to avoid a compressor stall

A

Operability valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

Approach bit met for Landing?

A

Flaps greater than 20

 Or

Gear down

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

How many channels does eachFADEC have?

A

Two channels.. One active and one monitoring

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

15% split N1 between engines?

A

Engine failure detected therefore APR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

Continuous ignition?

A

Both igniters on both engines

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

VG Compressor linkage?

A

Only the first four stages

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

Idle?

A

Different Idle stages for different phases of flight

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

Engines?

A

2 general electric CF34 -8C5

13600 thrust

14510 APR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

What provides most of thrust

A

Bypass air

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

The VG System is controlled by FADEC and positioned by actuators through a

A

Mechanical linkage

High pressure fuel from the engine fuel metering unit hydraulically moves the actuators

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

The operability valve. Is controlled by

A

FADEC

and hydraulically actuated by high-pressure fuel from the fuel metering unit

52
Q

Flex power can only be entered when

A
  • Thrust levers are in Idle or shuts off
  • Wait on wheels for at least one minute
  • Assumed temperature entered is greater than the actual OAT
  • Airspeed is less than 65 kts
53
Q

Assumed temperature can’t be cleared by

A

-Selecting delete on the FMS CDU

-if the FMS is not available
Select FLX RESET on the EICAS menu page

54
Q

The starting and ignition systems are controlled by the

A

FADEC

55
Q

What is required for starter operation

A

DC power and pressurized air(pneumatics)

56
Q

Each independently controlled ignition system consists of

A

Two ignition exciters into two igniter plugs

57
Q

Do the ignition systems alternate between A and B with each Successive start?

A

Yes

58
Q

What is the start protection function?

A

On the ground the FADEC prevents engine damage due to either hot or hung starts

59
Q

Fuel from the collector tanks is supplied to the respective engine fuel pump unit by

A

A main ejector or an electrical boost pump

60
Q

What does the fuel oil heat exchanger do

A

Uses hot engine oil to heat the fuel

Uses cold fuel to cool the engine oil

61
Q

If an inadvertent thrust reverser deployment ….what happens?

A

FADEC Will schedule idle thrust

However the pilot must place the thrust reverser in the idle position

20-20-1 mes

62
Q

When is the FADEC system powered by the aircraft electrical system?

A

Until N2 reaches 50% RPM

63
Q

When is the FADEC system powered by the gearbox mounted alternator

A

Above 50% N2

64
Q

Cruise —– proportional increase

CLB—–MCT

TOGA—APR

A

.

65
Q

Engine failure detected if

A

N1 speed decreases below 15% of the “SET” power

66
Q

When will we see APR displayed in the N1 gauge?

A

If APR is activated by an engine failure

          Or

When the thrust Lever is set to the max power detent

67
Q

Going to Max thrust gives?

A

APR on both engines

68
Q

N1 synch is enabled when?

A

Rt N1 must be within 1.5% of the left N1

69
Q

N2 sync?

A

The right engine N2 must be within 2.5 % of the left engine N2

70
Q

Engine overspeed protection is provided when

A

N2 exceeds 107%

Sensed by the FADEC

71
Q

When the wing anti-ice is selected on

A

N2 indicators will display a partial white band below the green band

IF N2 decreases into the white range, the N2 pointers will turn white

72
Q

Test

ENGINE OVERSPEED warning

A

Indicates that N1 or N2 has exceeded redline for more than four seconds

73
Q

What happens when the oil pressure gauges show normal pressure during engine start

A

The gauges revert to N1 vibration gauges

74
Q

Overspeed protection when

A

N2 exceeds 107%

75
Q

When will the FADEC quit attempting relights?

A

If three or more overspeed conditions have been detected within 30 seconds

76
Q

APR armed when?

A

TKEOFF? N1 of both engines are within 8 percent of the take off N1 value

APPROACH? Either engine available, flaps greater than 20° or landing gear down

77
Q

Engine failure detected when

A

N1 speed of an engine decreases below 15% of the set power

if failure was due to on an N1 mismatch? The failure signal is cleared when the mismatch becomes less than 13%

78
Q

Which engine is the master engine regarding synchronization

A

Left engine is the master engine and the right engine will be slaved to it

79
Q

N1 sync?

A

Rt within 1.5% of left

80
Q

N2 sync?

A

Rt within 7.5 of left

81
Q

What is required for starter operation

A

Pressurized air and DC electrical power

82
Q

N2 VIB?

A

Indicated as a VIB icon on the respective N2 gauge

83
Q

N1 vib gauge?

A

Displayed after engine start when oil pressure is normal and engines are at Idle

84
Q

How Is engine oil cooled and combustion fuel heated?

A

The fuel oil heat exchanger

85
Q

How many ITT probes?

A

5

86
Q

What controls The operability valve?

A

Fuel is used to control and actuate the operability bleed valve

87
Q

N1sections?

A

Single stage fan rotor

Four stage low pressure turbine

88
Q

How much of the air which passes through the engine is bypass there versus core air?

A

85% of the air is bypass air

15% is core air

89
Q

The accessory gearbox is driven by the

A

Driven by the N2 rotor

90
Q

The variable geometry system changes the position of which stator vanes?

A

The first four stages of Statorveins

91
Q

What also helps provide additional bleed air offload in addition to the variable geometry system?

A

Operability valve

92
Q

What actuates the variable geometry compressor linkage?

A

Fuel

93
Q

What actuates the operability valve?

A

Fuel

94
Q

Does the FADEC have its own power source?

A

Yes

FADEC alternator

95
Q

FMU fuel metering unit supplies high pressure fuel for actuating?

A

Operability valve

VG inlet guide vanes

VG Compressor stater vanes

96
Q

Thrust reverser limitations during landing

75/60

A

Max reverse thrust not permitted below 75 kias

Idol reverse by 60 kn

97
Q

Each FADEC has 2 channels..

A

Alternated on each successive start

98
Q

Starting sequence?

A

The starter drives the engine accessory gearbox which in turn drives the engine N2 core section

99
Q

Where are oil filter impending bypass and chip detector indications provided or seen?

A

On the engine fault panel in the aft equipment bay

100
Q

What happens after an engine over speed? (N2 107%)

A

Overspeed condition is detected

Shut off valve closes stopping fuel flow

Engine flames out

FADEC Detects flame out and turns on ignition

N2 decreases below over speed threshold

Automatic relight occurs

101
Q

No more than three over speed conditions within what time.

A

30 seconds.

22-50

102
Q

What air is to use before the thrust reverser’s?

A

Bypass air

103
Q

Both ignition systems are AC?

A

Yes

104
Q

When do we move both thrust Levers into the max power detent?

A

Wind shear recovery

CFIT

Stall recovery

105
Q

Thrust reverser system is armed when

A

Switch selected on

Hydraulic pressure available

106
Q

Thrust reverser deployed in-flight memory item

A

Affected thrust lever..Confirm and Idle

107
Q

Flex thrust Can be set?

A

Thrust levers idle or shut off

WOW1 minute

Assm’d temp greater thanOAT

A/S less than 65 kts

108
Q

Continuous ignition during flame out?

A

Yes

109
Q

Memory Item dual engine failure?

A

Cont ign

110
Q

GA mode is armed on appch?

A

 Landing grear down
Or
Flaps greater than 20

Crj 900 (45 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions