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A320 > Engines > Flashcards

Engines Flashcards

1
Q

What engine is in the A319?

A

IAE V2524-A5 (24,000#)

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2
Q

What engine is in the A320?

A

IAE V2527-A5 (27,000#)

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3
Q

What engine is in the A321?

A

IAE V2530-A5 (32,500#)

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4
Q

What is on the N1 shaft?

A

Fan, LP compressor and LP turbine

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5
Q

What is on the N2 shaft?

A

HP compressor and HP turbine

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6
Q

What is on the accessory gearbox and what are they powered by?

A

Fuel Pump
Oil Pump
Alternator

Powered by the N2 shaft

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7
Q

What are the functions of the FADECs?

A

Fuel flow, thrust reverser and ignition control

N1, N2 and EPR limits protection

EGT limits protection

Starter engagement time and speed protection

Fuel and Thrust limit computations

Computation of thrust penalties

Accelleration and deceleration schedules

Idle settings

Engine information to cockpit

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8
Q

What does the FADEC control during ground starts?

A

Controls start sequence

Provides full protections

Has start abort authority

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9
Q

What FADEC feature is only available during ground starts?

A

Start abort authority

EGT protection

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10
Q

What does the FADEC do during manual starts?

A

Monitors and provides cautions and warnings

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11
Q

What are the 3 idle settings?

A

Modulated Idle: on ground and in-flight when slats retracted (lowest idle, long spool up times)

Approach idle: in-flight when slats are extended (low spool up time for go arounds)

Reverse Idle: REV IDLE position (slightly higher than modulated idle)

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12
Q

How is (EPR) Engine Pressure Ratio calculated?

A

P5 (LP turbine exhaust) vs P2 (engine inlet pressure)

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13
Q

What are the 2 modes of the FADEC for setting thrust?

A

EPR (Engine Pressure Ratio)

N1

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14
Q

When the FADEC regulates thrust in EPR mode, what are the parameters?

A

Thrust Lever Angle (TLA)

Altitude

Mach Number

Ambient Temperature

Air inlet total temperature

Air bleed demands

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15
Q

When EPR mode fails, the FADEC reverts to N1 mode. What important features are lost in N1 mode?

A

No Autothrust

No Alpha Floor

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16
Q

What are the 2 types of N1 mode?

A

Rated N1 mode

Unrated N1 mode

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17
Q

What is the difference between Rated and Unrated N1 modes?

A

Rated N1 Mode: N1 limits and protections are displayed on E/WD, can be selected manually

Unrated N1 Mode: Used with EPR and Rated N1 mode failures. N1 limits not displayed and FADEC provides limited overspeed protection. (emergency)

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18
Q

What is the redundancy within the FADEC?

A

Channels A and B provide backup and redundancy

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19
Q

When does the engine alternator provide power to the FADEC?

A

N2>10%

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20
Q

How is the IDG and Engine Oil cooled?

A

By heat exchange with the fuel

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21
Q

When does the FADEC command continuous ignition?

A

ENG ANTI ICE ON

Take off thrust selected

Engine Interface Unit (EIU) fails

Approach Idle (slats extended)

Engine flameout or surge detected

ENG MASTER cycled on-off-on

22
Q

What type of reverse thrust is used?

A

Translating Sleeve, which redirects Fan Air only

23
Q

What does the thrust reversers require prior to activation?

A

At least 1 FADEC channel op

Landing Gear Control and Interface Unit (LGCIU) detects aircraft is on the ground.

24
Q

When would you get a FAULT light on the engine control section of the pedestal?

A

Auto start is aborted

Start valve fault

HP fuel valve not in commanded position

25
Q

What does the IGN/START switch do?

A

Manually selects continuous ignition

Prepares the engine for the start process

26
Q

What does the CRANK switch do?

A

Prepares the engine for dry cranking (no ignition or fuel flow)

Starter will engage when MAN START is selected

27
Q

How long is TOGO powered limited to?

A

5 minutes

28
Q

What is the speed limitation of Max Reverse?

A

Max reverse should not be used below 70 kts

29
Q

What are the 2 auto-thrust modes?

A

Armed: during TOGO or FLX or when Thrust levers not in active range (between CLB and IDLE)

Active: pushing the FCU A/THR pb

30
Q

When auto-thrust is activated, what do the levers do?

A

The lever now become thrust limiters, therefore us leave them at the CL detent to give auto-thrust full authority.

Note: the exception is when Alpha Floor is activated in which TOGA power is activated regardless of lever position

31
Q

How can you disengage auto-thrust?

A

Disengage buttons on the levers

Selecting A/THR pb off

Moving the thrust levers to idle (landing)

32
Q

The amber tick mark on the EGT gauge is the calculated max EGT for that thrust range. When is the tick mark not present?

A

TO
Reverse
Alpha floor

33
Q

What is the red tick mark on the EGT gauge?

A

Highest value achieved

34
Q

What does a “+” by N1 mean?

A

N1 went above 100%

35
Q

When will the oil pressure be amber?

A

<80psi

36
Q

When will the oil pressure be red?

A

<60psi

37
Q

When will oil temp be amber?

A

> 155C

38
Q

When will oil temp be red?

A

> 155C for 15 minutes or >165C

39
Q

When will vibration pulse?

A

5 units

40
Q

Which engine is started first and why?

A

2 because it provides pressure for the yellow hydraulic system which provides parking brake pressure

41
Q

What is the memory air for ensuring a stabilized engine start?

A

2,4,6,8,10

20% N1
400 EGT
60% N2
800 Fuel Flow
1.0 EPR
42
Q

Why would you manually start an engine?

A

To allow the engine to reach its max motoring speed prior to ignition and fuel flow

43
Q

When is a manual start recommended?

A

Engine Stall

EGT overlimit

LO START AIR PRESS

No N1 rotation

Hungstart

IGN A/B Fault

44
Q

What is the minimum N2% required for a manual start prior to turning ON the engine master switch?

A

15% N2

45
Q

When does the FADEC close the start valve?

A

N2 between 43-48%

46
Q

What are the advantages to a FLEX TO?

A

Extending engine life

less fuel

47
Q

What does the FADEC do to reduce Fan Flutter?

A

Prevents N1 from stabilizing 60-74% N1, thus when you advance thrust levers, it will skip this range

48
Q

What EPR valve do you aim for to ensure proper engine indications before setting TO power?

A

1.1 EPR

49
Q

When shutting down the engine using the ENG FIRE button what happens?

A

Only the LP fuel valve is closed causing a 40 second delay as the fuel in the line is burned.

50
Q

When will the FADEC abort a start on the ground and indicate a FAULT?

A

Starter time exceeded

EGT overtemp

No light off

Lower than normal N1

Starter failure

Hung Start

51
Q

How can you tell if the FADEC reverted to UNRATED N1 mode?

A

Loss of the max N1% tick mark

52
Q

At what OAT would you select TOGA rather than FLEX?

A

When FLEX temp is within 10 degrees of OAT to avoid asymmetrical thrust (EPR/N1 discrepancy)

A320 (33 decks)

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