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AW139 Review > Engines > Flashcards

Engines Flashcards

1
Q

What is the minimum on-side Main Bus Voltage required prior to starting the engines?

A

23 Volts

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2
Q

In which position the Engine Mode switch should be when using the Engine Control Lever (ECL) in MANUAL mode?

A

The ENG MODE switch must stay in the IDLE or FLIGHT position

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3
Q

How will the engine respond when setting the Engine Control Lever (ECL) to the OFF position with the ENG MODE switch to the FLIGHT position?

A

The engine will flame out

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4
Q

How will the caution ECL FAIL affect the operation of the Engine Control Levers (ECL)?

A

The pilot must manually operate the ECL

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5
Q

What is the initial action for an ENG CHIP caution message?

A

Achieve a safe OEI flight

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6
Q

At which Ng% is the green caption Ignition (ING) and START on the Multi Function Display (MFD) desapears during engine start:

A

IGN at 49% Ng, START at 49% Ng

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7
Q

In which range can the engine control lever be moved using the ENG TRIM selector on the collective grip?

A

From MIN to MAX in manual mode

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8
Q

What is the position of the Engine Mode Switch when using the Engine Control Lever (ECL) in MANUAL mode?

A

The ENG MODE switch must stay in the IDLE or FLIGHT position

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9
Q

How will the engine respond when setting the engine control lever (ECL) to the OFF position with the ENG MODE witch to the IDLE position?

A

The engine will flames out

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10
Q

Which caution message is an indication of automatic reversion of the engine to manual mode?

A

EEC FAIL

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11
Q

How will the caution ECL FAIL affect the operation of the Engine Control Levers (ECL)?

A

The pilot must manually operate the ECL

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12
Q

What is the meaning of the ECL POS caution message?

A

The ENG GOV switch is in AUTO and the ECL is not in the FLIGHT position

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13
Q

What is the first actions required when an ENG CHIP caution message is displayed?

A

Achieve a safe OEI flight, bus-tie switch ON and ENG MODE switch to IDLE

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14
Q

How is the OEI TRAINING mode is achieved?

A

One engine has increased operating limits while the other is disengaged

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15
Q

In which governing mode is the engine overspeed protection available?

A

In both MANUAL and AUTO modes

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16
Q

How long the engine oil temperature is allowed to be between 145 °C and 150 °C for?

A

Maximum 1 minute is permitted

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17
Q

Abort engine start if engine doesn’t light up within?

A

10 seconds

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18
Q

Following a dry motoring procedure, engine restarting must not be carried out before?

A

30 seconds

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19
Q

At which NG speed does the engine starter disengage during start?

A

Disengaged by 49% NG

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20
Q

What is the airspeed restriction for an engine restart in flight?

A

Airspeed less than 120 Kts

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21
Q

What are the required actions in order to shutdown an engine in a emergency?

A

ENG Mode switch OFF FUEL PUMP switch OFF ENG FUEL switch OFF HEATER SOV 1 & 2 CLOSE

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22
Q

What are the engine starter duty cycle limits?

A

45 sec ON, 60 sec OFF, 45 sec ON, 60 sec OFF, 45 sec ON, 30 min OFF

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23
Q

What are the actions required during an aborted engine start?

A

Engine mode switch to OFF, ECL to OFF, FUEL PUMP to OFF and ENG FUEL switch to OFF

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24
Q

When is the START green legend is displayed next to the NG scale?

A

During either the AUTO or MANUAL starting sequence

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25
Q

What are the restrictions when the engine oil temperature is between 140°C and 145°C?

A

Reduce power to 60%, continue flight for 30 minutes maximum

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26
Q

What is the required action when engine oil temperature is above 150°C?

A

Shutdown engine

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27
Q

What are the initial actions required in case of ENG CHIP?

A

Establish safe single engine flight, bus-tie switch ON and ENG MODE switch to IDLE

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28
Q

When is the ING green legend is displayed next to the ITT scale on the MFD?

A

During either the AUTO or MANUAL start

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29
Q

What is the meaning of the green triangles displayed aside the TQ?

A

The LD SHARE switch on the Miscellaneous Panel is set to the TQ position meaning that the EECs adjust the engines to match their torque values

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30
Q

What is the indication displayed when ENG GOV switch is set to manual?

A

A MAN amber legend is displayed in reverse video aside the TQ and FLI scales

31
Q

What is the indication displayed when the OEI TNG mode is selected?

A

An amber OEI TNG legend is displayed vertically on-side of the PI scale

32
Q

What is the purpose of the three small holes aside the EEC cover?

A

To provide the correct fuel schedule with respect to the altitude

33
Q

What is the condition required for the warning 1 or 2 ENG OUT to be displayed?

A

NG bellow 50%

34
Q

What is the meaning of a 2 NG MISCOMPARE caution message?

A

A discrepancy of 3% between the NG EEC 2 data and the corresponding back up analog data exists

35
Q

What is the meaning of a 1 NF MISCOMPARE caution message?

A

A discrepancy of 3% between the NF EEC 1 data and the corresponding back up analog data exists

36
Q

What is the meaning of a 1 ITT MISCOMPARE caution message?

A

A discrepancy of 50ﾇC between the ITT EEC 1 data and the corresponding back up analog data exists

37
Q

What is the meaning of a 2 TQ MISCOMPARE caution message?

A

A discrepancy of 5% between the TQ EEC 2 data and the corresponding back up analog data exists

38
Q

Can an ENG CHIP be burn?

A

No, chip burners are only installed in the MGB, TGB and IGB

39
Q

Can an IGB and TGB chips be burn?

A

Yes

40
Q

How many chips can be cleared in one flight?

A

A maximum of 3 IGB or 3 TGB chips can be cleared in one flight.

41
Q

When are the green captions ING and START on the MFD disappears during engine start?

A

Both indications should disappear by 49% Ng

42
Q

An engine compressor stall can be indicated by loud banging or popping noise and?

A

An increase in ITT

43
Q

In case of an engine compressor stall with abnormal indications on MFD, the first action to carry out is:

A

ENG MODE to IDLE

44
Q

If the FUEL FILTER caution appears, monitor engine power and ?

A

Land as soon as practicable

45
Q

What is the engine restart in flight pressure altitude restriction?

A

Need to wait until NG reach 0% prior to start above 15000 ft Hp

46
Q

What are the required actions for engine dry motoring?

A

ENG GOV switch to AUTO, ENG MODE switch to OFF, ECL to OFF, FUEL PUMP switch to OFF, ENG FUEL switch to OFF and ENGINE IGN circuit breaker OUT

47
Q

What is Engine Control Lever operational beep range in manual mode?

A

From MIN to MAX

48
Q

What is Engine Control Lever operational beep range in auto mode?

A

From MIN to FLIGHT

49
Q

What is the meaning of the ECL FAIL caution message?

A

The associated engine ECL remote control beep is not functioning

50
Q

What type of indication(s) is provided In case of engine oil low pressure (cas, audio tone, voice warning)?

A

ENG OIL PRESS cas message and WARNING voice message

51
Q

Which fault normally causes an engine automatic reversion to manual mode?

A

EEC FAIL

52
Q

In case of an engine oil overtemp what type of indication(s) do you receive (cas, audio tone, voice warning)?

A

ENG OIL TEMP cas message only

53
Q

Abort engine start if engine doesn’t light up within?

A

10 seconds

54
Q

What is the cooldown requirement before engine shutdown?

A

Stabilize engine for 2 minutes at IDLE

55
Q

What are the actions required If the engine doesn’t shutdown with ENG MODE to OFF during the aborted engine start procedure?

A

ECL to OFF, FUEL PUMP to OFF and ENG FUEL to OFF

56
Q

Quick engines starting can be achieved by selecting:

A

ENG 2 MODE switch to FTL when Ng1 is above 25%

57
Q

When the BUS TIE should be set to ON for start?

A

When starting any engine using external power or when the no.2 engine need to be started first on battery power.

58
Q

Which engine should be started first when using battery power and why?

A

Select bus tie to AUTO and start engine 1 first. This prevent the main bus no. 2 to be powered and will preserve battery power during pre-start checks.

59
Q

Manual engine starting is achieved by:

A

ENG GOV to MAN, ENG MODE to IDLE and pressing the ECL start button.

60
Q

In case of ENG ANALOG FAILURE caution:

A

One/more parameter/s has/have three dashed lines if analog data selected

61
Q

In case of ENG ANALOG FAILURE caution:

A

The MISCOMPARE caution for the failed parameter is inoperative

62
Q

In case of an engine of rotor parameters MISCOMPARE cas:

A

Confirm correct value with analog backup parameter and continue flight

63
Q

In case of a ENG ANALOG FAILURE cas message; how do you know which parameter have failed?

A

By selecting analogue sensor from the MFD PWR PLANT page menu. The failed parameter will show dash lines

64
Q

In case of ENG ANALOG FAILURE caution:

A

The pointer disappears if analog data selected

65
Q

The AW139 is powered by what type of engines?

A

By two Pratt & Whitney PT6C-67C

66
Q

What is the maximum SHP that each engine can supply in OEI condition?

A

1872 SHP

67
Q

What is the purpose of the engine PMA?

A

To provide the primary power source for the EEC unit when the engine runs above 40% Ng.

68
Q

How is the EECs powered during start?

A

The EEC is powered by the on-side ESS bus via the EEC 1(2) circuit breaker for engine starting operation (and also in case the PMA fails).

69
Q

Describe the compressor(s) system of the PT6C-67C

A

Four stage axial compressor and a one stage centrifugal compressor.

70
Q

How many fuel nozzles the combustion chamber of the PT6C-67C is equipped with?

A

Fourteen (14) fuel nozzles (mounted around the gas generator case)

71
Q

How many power turbine stages the PT6C-67C has?

A

Two (2) power turbine stages

72
Q

What is the purpose of the Nf limiter function of the EEC?

A

The Nf limiter energizes the overspeed solenoid valve in the FMM when NF threshold value reach 111%.

73
Q

At which value does the NF limiter commands the solenoid valve to reopen after an overspeed?

A

The valve reopens when the NF value drops below 109%

74
Q

Which information is provided by the power index indicator?

A

The PI is a composite display of the three primary engine parameters (Ng, ITT, Tq) on a single scale.

AW139 Review (1 decks)

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