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AW169 Type Rating (Leonardo) > Powerplant (71) > Flashcards

Powerplant (71) Flashcards

1
Q

What can be seen on the PFD & MFD with regards to Engines?

A

PFD - PI(Tq), NF, NR, ENG Oil T’s/P’s

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2
Q

What engines are fitted?

A

PW210-A

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3
Q

How is engine mounted?

A

2 x stainless steel mounts
1 x titanium torque tube

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4
Q

What is the Central Support and Engine cowlings made from?

A

Titanium
(for fire protection)

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5
Q

What are the exhaust lateral and exhaust central cowlings made from?

A

Composite material

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6
Q

What are the sections of the Engine?

A
  1. Reduction Gearbox
  2. Compressor
  3. Combustion Chamber
  4. Turbine
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7
Q

How is the speed from the PT reduced to a useable output?

A

Via single stage reduction gear

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8
Q

How is the engine accessory gearbox driven?

A

Via the Compressor Turbine (CT).

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9
Q

Where is the Np/Tq sensor fitted?

A

Outside of the Accessory Gearbox

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10
Q

How many stages in the compressor?

A

2
(1 Axial)
(1 Centrifugal)
TITANIUM

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11
Q

What is the purpose of the Variable Inlet Guide Vanes (VIGVs)?

A

To maintain the efficiency of the compressor.

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12
Q

How are the VIGVs controlled?

A

Via the FADEC

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13
Q

How is the Power Turbine (PT) temperature regulated?

A

Via P3 air

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14
Q

How are the Compressor Turbine (CT) blades attached?

A

Fir Tree serrations

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15
Q

How many Power Turbines are there?

A

2

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16
Q

How is exhaust gas temperature monitored?

A

8 Thermocouples mounted in the turbine exhaust

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17
Q

Where is the Engine Fuel Control Unit (FCU) mounted?

A

Mounted and driven by the Engine Reduction Gearbox

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18
Q

Where is fuel flow measured?

A

Via the FCU

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19
Q

Where is the Permanent Magnetic Alternator (PMA) for the engine installed?

A

Within the FCU

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20
Q

Is there bypass functionality within the fuel filter?

A

NO
Could result in an Engine Out condition

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21
Q

Where is the Fuel Oil Heat Exchanger Fitted?

A

On top of the RGB.

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22
Q

WHat is the purpose of the Fuel Flow Divider

A

To divert fuel to the primary and secondary manifolds
enables rapid and cooler engine starts

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23
Q

What happens to fuel drained form the fuel flow divider during engine shutdown?

A

It is used during the next engine start

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24
Q

How many fuel nozzles are there?

A

13
10 duplex, 3 simplex

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25
Q

What component is the primary means for engine shutdown?
What can be used in an emergency?

A
  1. The metering valve (needle)
  2. In an emergency the FIRE ARM or EDCU can be used
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26
Q

What is the purpose of the stepper motor within the FCU?

A

Controls the metering valve

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27
Q

What is the purpose of the start exciter and what is its output?

A

Converts low voltage aircraft electrical bus to high voltage
3,000Vdc

28
Q

How many and in what position are the spark igniters?

A
  • 2
  • 4 & 8 O’clock position
29
Q

How do the igniters behave on the ground and in flight
(3)

A

ON GROUND
One igniter (unless one fails then the other will initiate)
IN AIR
Two igniters

30
Q

When does Ignition drop off during engine start?

A

50%Ng

31
Q

What powers the VIGV Actuator?

A

The engine PMA

32
Q

What redundancy is built into the EECUs?

A

Each EECU is dual channel

33
Q

What powers the EECUs?

A

NORM:
- PMA within the FCU
START and BACKUP:
- Channel A - EMER
- Channel B - ESS

34
Q

What is the purpose of the Rotary Variable Differential Transducer (RVDT)?

A

Provides position of the collective to the EECU

35
Q

What is the purpose of IDLE APU on ENG1?

A

Drives components attached to the Accessory Gearbox

36
Q

What happens if the ACC Actuator fails to engage within 10 seconds?

A

[APU MODE FAIL] Caution

37
Q

To ENGAGE #1 to MAIN from APU
(MAIN SELECTION)

A
  1. # 1 IDLE/APU, #2 FLT
  2. # 1 OFF, #2 IDLE/FLT
38
Q

To DISENGAGE #1 from MAIN to use as APU mode…
(ACC SELECTION)

A
  1. # 1 OFF, #2 OFF/IDLE/FLT
  2. # 1 IDLE/APU, #2 FLT
39
Q

Is it possible to re-clutch engine #1 to the main rotor with both engines off?

A

NO

40
Q

What happens when OEI TRG is selected?

A

OEI TNG indicates on the PI

41
Q

What does a flashing 2.5m indicate on the PFD?

A

That the 2.5m OEI will expire within 10 secs

42
Q

What does pressing the AEO LIM SEL do?

A

Selects between LOW and HIGH Torque Limits

43
Q

What is the Take off Power (TOP) time limit?

A

30 mins

44
Q

What 3 fault categories are associated with the EECU?

A
  1. Minor (No CAS)
  2. Degraded (Caution + ENG SYnoptic)
  3. Major (Warning + behaviour)
45
Q

What is a fail Idle condition in the EECU?
[1(2) EECU FAIL]

A

Major fault where the engine reverts to IDLE to keep the associated generator online

46
Q

What is a Fail Fixed condition on the EECU?
[1(2) FAIL FIXED]

A

MAJOR fault where the fuel metering valve is maintained at a fixed position

47
Q

Where are EECU Degraded faults displayed?
[1(2) ENG DEGR]

A

MFD Engine Synoptic page

48
Q

What provides Ng?

A

Permanent Magnetic Alternator (PMA)

49
Q

What do the EECUs cross-talk for?
(3)

A
  • OEI Detection
  • Engine Matching
  • OEI Training
50
Q

How many thermocouples are fitted for ITT and what is the signal called?

A
  • 8
  • T6
51
Q

When will a yellow NR symbol be posted?

A

NR miscompare (>3% difference between EECU1 & 2)

52
Q

What does [1(2) FUEL FILTER DEGR] signify?

A

Impending blockage

53
Q

What are the starter duty cycles?

A

On of the following 3 times…
- 45s on, 10m off
- 30s on, 5m off
- 15s on, 2m off

Then 30 mins off.

54
Q

Can the ENG oil filter be bypassed?

A

YES

55
Q

Where is the Air Cooled Oil Cooler (ACOC) located?

A

Fwd section of the Engine RGB

56
Q

What is the purpose of the thermal bypass in the Air Cooled Oil Cooler (ACOC)?

A

For oil to bypass the matrix when <54°C

57
Q

What are the 2 methods to burn a chip?

A
  1. EDCU
  2. MFD Bezel Key
58
Q

What does [1(2) ENG OIL FILTER] signify?

A

Impending oil filtration bypass

59
Q

Where is the Engine Oil pump located?

A

Within the Engine RGB

60
Q

What is the primary purpose of the engine oil?

A

To lubricate the engine bearings

61
Q

Where is the engine chip detector located?

A

At the bottom of the RGB

62
Q

What causes [1(2) ENG OIL TEMP]?

A

Oil temp >135°C

63
Q

What drives the APU actuator to DISENGAGE ENG1 from the MAIN?

A

Electrical motor

64
Q

What state must ENG2 be at when configuring for APU mode?

A

HIGHER STATE

65
Q

What is the max starting temp?

A
  • 750°C
  • 825°C transient
66
Q

Is there HOT START protection whilst in the air?

A

NO

67
Q

How is oil distributed throughout the engine?

A
  • Single pressure pump
  • 3x scavenge pumps

AW169 Type Rating (Leonardo) (30 decks)

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