Brainscape's Knowledge GenomeTM

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


See full index

A388 CBT EK Pre-Join > CBT - Engines (Both) > Flashcards

CBT - Engines (Both) Flashcards

1
Q

Both

An accessory gearbox located at the bottom of the core case transmits mechanical power via the …

A

the HP rotor

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

Both

What does the accessory gearbox power?

A
  • One engine-driven generator
  • Two hydraulic engine-driven pumps
  • A pneumatic starter
  • A FADEC dedicated alternator
  • Oil pumps, and
  • Engine fuel pumps.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Both

Describe briefly the role of the Full Authority Digital Engine Control system (FADEC)

A
  • Engine protection in the entire aircraft envelope and weather conditions
  • Engine power management (thrust control and idle settings)
  • Ignition and starting, and
  • Engine parameters monitoring and display.

Has dual independent channels

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

Both

What are the 3 END IDLE modes?

A
  • Normal idle
  • Approach idle during approach with flaps or gear extended, and
  • Reverse idle while on-ground with reverse thrust selected.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

EA GP7200

How many modes does the FADEC have for computing commanded thrust?

and what may cause it to alternate between those modes

A
  • Normal (actual thrust THR is the primary parameter)
  • Degraded (N1 as primary parameter to control the thrust)

The FADEC will be degraded if some air data parameters from the probes are lost

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

Both

LP and HP fuel shut off valves are commanded by?

A

ENG Master switch controls the LP and HP
ENG FIRE pb switch switches off the LP

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

Both

How are the rev thrusters actuated?

A

electrically

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

EA GP7200

What is “ACUTE”

A

Airbus Cockpit Universal Thrust Emulator

Basically instead of N1 as the primary indicator for thust. The actual thrust is the indicated as a percentage from 0-100 of the actual max available thrust. So if Max N1 is 89% it will show as 100 in the THR with bleed off

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

EA GP7200

How is a degraded engine shown and is A/THR available then?

A

N1 becomes the primary indicator.

A/THR is only lost if 2 or more engines are degrade

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

GP 7200

What protections does the FADEC provide

A

The FADEC controls Engine protections against:

* N1/N2 overspeed

* EGT overlimit

* Overthrust

* Engine stall, and

* Engine flame out.

FADEC can automatically shutdown engines whilst applying some of these protections without crew action

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

RR Trent 900

What protections does the FADEC provide

A

The FADEC controls Engine protections against:

* N1/N2/N3 overspeed

* EGT overlimit

* Overthrust

* Engine stall, and

* Engine flame out.

The FADEC will shutdown the engine in case of LP/IP shaft failure and overthrust.

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

Both

describe the “auto idle” function

A

A protection is provided by FADEC if higher than idle thrust is commanded during revereser deployment on an outboard engine. Fadec commands that engine to idle

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

Both

What main differences exist in the stages of the engines between the RR Trent 900 and GP7200?

A
  • RR: LP/IP/HP Compressors and Turbines (N1,N2,N3)
  • GP 7200: LP/HP Compressors and Turbines (N1,N2)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Both

Wheb does the fadec alternator becomes self suffiecient to power the FADEC?

A
  • RR: N3>8
  • EA: N2>12.5
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

RR TRENT 900

How many modes does the FADEC have for computing commanded thrust?

A
  • NORMAL (THR )
  • ALTERNATE (primary engine parameter is N1 but THR is displayed)
  • DEGRADED (the primary engine parameter is N1, and is displayed on the EWD)

ALTN will have a dedicated pb sw in the ENG OVHD panel

The FADEC will be degraded if some air data parameters from the probes are lost

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

RR Trent 900

What is the main difference between Alternate and Degraded FADEC modes?

What determines if the engine reverts to either?

A

ALTN mode, is a N1 rated mode, N1 rating limits are kept, or
DEGRADED mode, is a N1 unrated mode, N1 rating limits are lost.

Reversion depends on what air data parameters have been lost

17
Q

What protection exists if a reverser is deployed in flight?

A

the FADEC will limit engine power to forward idle if it detects an inadvertent deployment of the thrust reverser in flight (reverse unlocked protection).

18
Q

Both

What is the main difference between manual and automatic start?

A

Automatic The FADEC fully protects the engines from exceeding parameters and aborts the start in those cases.
Manual: FADEC is passive and pilots will need to abort to avoid exceeding parameters

Manual allows pilot to reach maximum rotoring speed before starting the engine when automatic is not possible

19
Q

Will FADEC be able to detect which relight envelope the aircraft is in in case of an engine fail/flameout?

A

Yes

20
Q

Both

How does the ignition system differ between RR and EA?

A

EA: Only one igniter (A or B) is used for auto start and they alternate between successive starts
RR: The use of both or single igniters is dicatated by the EGT temp (footnote)

igniton for EA starts at 20 s after N2 20%, RR N3 max start N3 or 25%

RR: if EGT < 100 One igniter is used, if EGT 100-150 two igniters, and if EGT>150 then it will dry crank until it cools below 150 and use both igniters

21
Q

Both

What does and indication of 100% THR mean?

A

Thrust lever at TOGA and ENG Bleed OFF

22
Q

RR

Is there a thrust limitation in ALTN mode?

A

Max THR reduced by 4%

23
Q

Take off Procedure

The FADEC provides a Modified Engine Take/off Thrust Setting (METOTS). What is this?

A

(METOTS) prevents the engine from exceeding 78 % of N1 below 35 kt. METOTS results in a discontinuous THR increase during takeoff roll

24
Q

Take Off Procedures

The FADEC provides a Keep Out Zone, What is this?

A

Keep Out Zone (KOZ) prevents steady-state operation when N1 is between 64 % and 72 % and
airspeed below 60 kt

25
Q

Take Off Procedures

The FADEC provides a Keep Out Zone, What is this?

A

Keep Out Zone (KOZ) prevents steady-state operation when N1 is between 64 % and 72 % and
airspeed below 60 kt

26
Q

Take off Procedure

The FADEC provides a Modified Engine Take/off Thrust Setting (METOTS). What is this?

A

(METOTS) prevents the engine from exceeding 78 % of N1 below 35 kt. METOTS results in a discontinuous THR increase during takeoff roll

A388 CBT EK Pre-Join (20 decks)

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