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National 747-400BCF Systems > Engines > Flashcards

Engines Flashcards

1
Q

What is the model of the GE engines we have? And it’s rated thrust?

Pratt Engines?

A

CF6-80C2-B5F

56,500 lbs of thrust

PW-4056

57,100 lbs of thrust

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2
Q

How do you cancel an engine exceedance red box?

How do you recall it again?

A

Push the cancel button on the DSP

Push the recall button

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3
Q

What does the amber band mean on the EGT bar?

For how long is the amber band exceedance inhibited on takeoff or go around?

A

MCT

5 min

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4
Q

If your secondary EICAS display fails and you want to see all your engine instruments on the primary in compact mode how do you do that?

A

Press ENG on the DSP

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5
Q

What happens if you’re viewing a synoptic on the secondary EICAS and you have an engine exceedance?

A

The primary EICAS goes to compact automatically indicating what the exceedance is

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6
Q

When is approach idle active?

A

Flaps to landing position

Or NAC is on

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7
Q

Is there thrust limit protection when in manually selected alternate EECmode?

A

No, if they are near full forward they will exceed it

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8
Q

ENG 1,2,3,4 EEC MODE

ALTN

A

EEC is in alternate control mode.

Objective: place all EEC in alternate

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9
Q

> ENG 1,2,3,4 LIM PROT

A

EEC is in the alternate mode and command N1 is more than the limit

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10
Q

ENG 1,2,3,4 FUEL VLV

A

One or more of these occur:

The engine fuel valve NIPS

Fuel spar valve NIPS

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11
Q

> ENG 1,2,3,4 RPM LIM

A

N2 red line limit restricts engine thrust

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12
Q

> IDLE DISAGREE

A

1 or more engines are not idling at the same rpm (app vs min idle)

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13
Q

> ENG 1,2,3,4 REVERSER

A

On the ground, a fault occurs in the thrust lever position

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14
Q

ENG 1,2,3,4 START VLV

A

Start valve is not in the commanded position

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15
Q

> ENG CONTROLS

A

3-4 EEC systems opérate in degraded mode. Systems don’t have full redundancy.

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16
Q

ENG IGNITION

A

CONT IGN SYS Has failed

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17
Q

ENG 1,2,3,4 FAIL

A

An eng fail

Or

Flameout

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18
Q

ENG 1,2,3,4 Control

A

EEC sys fault occurs

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19
Q

> AUTOSTART OFF

A

N919CA AND N952CA only

Engine Autostart switch is off

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20
Q

APU FUEL

A

Low pump pressure is detected when activated

Or

APU fuel valve NIPS

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21
Q

What does a magenta oil quantity mean?

A

Low oil

22
Q

What is the certified vibration limit?

If the vibration monitoring system cannot detect if N1 or N2 are the culprits what does the indicating system show?

A

There is none, however a magenta vibration notes the high vib

BB- broadband (vibration over whole engine)

23
Q

ENG 1,2,3,4 OIL PRESS

A

Low oil press

Engine damage or failure possible

24
Q

ENG 1,2,3,4 OIL TEMP

A

High oil temp

Possible engine damage may occur

25
Q

ENG 1,2,3,4 FUEL VLV

A

One or more of these:

Engine fuel valve NIPS

Spar valve NIPS

If during start, engine won’t start.

In shutdown, engine continues to run until remaining fuel is burned.

26
Q

What does the light mean in the start switch?

A

Start valve open

27
Q

When does the start valve open on start?

A

When fuel control switch is in run.

28
Q

What does the red limit line on EGT signify during start?

A

Max start temp

29
Q

What 3 things does Autostart not monitor?

A

N1
Oil temp
Oil press

Abort or shutdown if no N1 or oil press by Idle N2

30
Q

What does Autostart do if it does not detect EGT rise?

A

Cuts fuel and ignition, motors for 30 secs.

Then applied ignition to both igniters and fuel .

Three attempts before aborting Autostart

Motors for 30 secs before start and bleed air valves close.

31
Q

If the Autostart detects an EGT rise but detects a hot or hung start what does it do?

A

it cuts fuel, adjust fuel schedule and reapplies for another attempt.

32
Q

In a manual start when to add fuel?

A

When it reaches the fuel on indicator on n2

33
Q

When will autostart terminaré start attempts for an inflight start?

A

When the engine starts or the pilots selects fuel cutoff

34
Q

If the auto igniter is in single what does it do each flight?

A

Alternates between 1&2 every other flight

35
Q

When does auto ignition activate?

A

Start with less than 50% N2
Flaps out of up
NAC ON
FLAMEOUT (both)

36
Q

What does selecting stby ignition to 1 or 2 do?

A

Applies stby power as the power to that igniter continuously

In norm, it is powered by AC pwr. However if the AC power is not powered igniter 1 is powered by stby power continuously.

37
Q

STARTER CUTOUT 1,2,3,4

A

Start valve does not close (at 50% N2 after start finished)

Light in start switch doesn’t go out

38
Q

ENG 1,2,3,4 AUTOSTART

A

Autostart ON, engine failed to start.

Fault detected in Autostart system

Start parameters exceeded

Manual start EGT parameters rapidly reaching limit

Manual start RUN selected too early.

39
Q

What does raising the reverse thrust levers to idle do?

A

Disc auto throttle
Raises auto speed brakes if not armed before landing

(Does the same on a rejected takeoff)

40
Q

> ENG 1, 2,3,4 REVERSER

A

Fault detected in the reverser system

41
Q

ENG 1,2,3,4 FUEL FILT

A

Fuel contamination can cause fuel to bypass the engine fuel filter

42
Q

ENG 1,2,3,4 LOW IDLE

A

ENGINE IDLE not in approach setting when commanded

Advance thrust til extinguished

43
Q

ENG 1,2,3,4 OIL FILT

A

Oil Filter contamination can cause oil to bypass the oil filter

44
Q

> ENG 1,2,3,4 SHUTDOWN

A

Engine was shutdown by the fuel control switch or the engine fire switch.

45
Q

What protections do you have with the EEC in Norm?

In ALTN?

Do you have autothrottles in ALTN?

A

Overboost and Overspeed

Only overspeed

No

46
Q

On the Pratt engines by what N2 must you have an N1 indication?

After how many minutes must the engine reach idle N2?

A

40%N2

2 min

47
Q

What is the cool down time fir the Pratt’s and GE’s after landing?

A

Pratt’s 5 min

GE 3 min

48
Q

What’s the difference in warm up between the GE’s and Pratt’s before takeoff?

A

GE’s must be above bottom of oil temp scale and 3 min run

Pratt’s oil temp above amber band and if engines shutdown more than 2 hours run for 5 min

49
Q

What’s the difference in cool down for the GE’s vs the Pratt’s after landing?

A

GE -3 min
Pratt - 5 min

50
Q

For GE’s what limitations are there for cold soaked engines?

A

More than 4 hours at -30C or below DONT START ENGINE. Call maintenance to do procedure.

51
Q

What’s the difference in engine run up between GE and Pratt?

A

GE- 60% n1 for 30 sec every 30 min

PRATT- 50% N1 for 1 Sec every 15 min

National 747-400BCF Systems (27 decks)

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