Brainscape's Knowledge GenomeTM

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


See full index

Mesa > APU - Powerplant > Flashcards

APU - Powerplant Flashcards

1
Q

Max permissible load on the APU Generator?

A

40 KVA

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

Max altitude for starting?

A

37,000 ft

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

Max altitude for APU operation?

A

41,000 ft

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

Max altitude for APU bleed air extraction?

A

25,000 ft

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

Max speed with APU door open?

A

220 KIAS if APU not operating

No speed limitation if APU is operating

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

What battery voltage is required before starting the APU?

A

22 volts on both batteries

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

What does the main battery power during an APU start?

A

APU ECU

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

What does the APU battery power during an APU start?

A

Cranking of the 28 VDC start motor

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

When will the AVAIL switchlight illuminate?

A

99% RPM plus 2 seconds

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

What is the CRJ-900 Powerplant Model Number?

A

General Electric CF34-8C5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the CRJ 700 Powerplant Model Number?

A

Either General Electric CF34-8C1 or General Electric CF34-8C5B1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the thrust rating without APR/with APR?

A

13,560 lbs without

14,750 lbs with

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the Max ambient air temperature for takeoff and landing?

A

ISA + 35°C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the Min ambient air temperature for takeoff and landing?

A

-40°C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the Max Altitude for a windmill start?

A

21,000 ft MSL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Max engine to engine N2 split at ground idle power?

A

2%

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

How much of the thrust is produced by core air?

A

Approximately 20%.

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

How much thrust is produced by by-pass air?

A

Approximately 80%.

19
Q

How many stages of compression do we have?

A

The engine is equipped with a 10 stage axial flow compressor

20
Q

What accessories are driven off the N2 accessory gear box? (fish oil plus)

A
  1. Engine driven fuel pump
  2. IDG
  3. air turbine starter
  4. engine driven hydraulic pump
  5. oil pump
  6. FADEC alternator
21
Q

What is the engine bleed air used for?

A
  1. Engine start
  2. air conditioning
  3. pressurization
  4. wing and cowl anti-ice
22
Q

What stages of bleed air are used?

A

Normally 6th stage, 10th stage used when demand exceeds capability of 6th stage

23
Q

What allows 10th stage bleed air availability?

A

Air Conditioning System Controller (ACSC) automatically opens the High Pressure Valve (HPV).

24
Q

How many igniters are installed on each engine?

A

Two

IGN-A and IGN- B.

25
Q

What are the required parameters before fuel is introduced during a ground engine start?

A

20% or greater N2

ITT <120°C

26
Q

What is the air pressure requirement provided by the operating engine to initiate a cross-bleed start?

A

42 PSI to a maximum of 80% N2

27
Q

When will APR arm on takeoff?

A

Engine speed within 8% of scheduled takeoff power, normal or flex

28
Q

When will the APR system activate?

A

Thrust levers in TOGA

Normal or flex thrust scheduled and N1s differ by 15% or greater or when thrust levers set in the MAX POWER detent.

29
Q

What occurs when the APR system activates?

A

FADEC commands an N1 speed increase dependent on thrust lever position.

30
Q

What indication will we have of APR activation?

A

Green APR icon on operable engine N1 gauge.

31
Q

If an engine fails during a go-around, will the APR system activate?

A

Yes.

32
Q

What is used to deploy and stow the thrust reversers?

A

Hydraulics L reverser uses hydraulic system #1

R reverser uses hydraulic system #2

33
Q

How are the thrust reversers deployed?

A

Thrust levers must be at idle.

The reverse thrust levers are raised by engaging the thrust reverse release triggers. A solenoid lock stops reverse thrust lever movement while the reversers deploy.

Once deployed, the lock releases and N1 may be increased by raising the reverse thrust levers.

34
Q

What is occurring during thrust reverser deployment?

A

The translating cowls move aft.

The bypass air is redirected through cascade vanes which redirect the air forward.

35
Q

What indications will be seen with normal thrust reverser deployment?

A

Green REV icon on N1 gauges.

36
Q

When do the thrust reversers need to be either stowed or at idle?

A

CRJ900: 60 kts

CRJ700: 75 kts

37
Q

What happens when a thrust reverser inadvertently deploys?

A

FADEC commands reverser to close and

thrust set to idle on affected engine.

38
Q

What are the indications of an inadvertent thrust reverser deployment?

A

Amber REV icon on N1 gauge REV UNLOCKED caution message

39
Q

What is the normal air source for engine starts?

A

APU or cross-bleed if doing a single engine taxi.

40
Q

What source is used if the APU is INOP?

A

Ground air cart or bottle attached to the high pressure air ground connection to start one engine.

A cross bleed start is then used to start the other engine after clearing it with ground control.

41
Q

Where is the high pressure air ground connection located?

A

Under left engine nacelle

42
Q

When will the starter cut-out during an engine start?

A

50% N2

43
Q
A

Mesa (7 decks)

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