Engine Ops Limits Flashcards

1
Q

Normal engine ITT range is _____ (Malfunction if stabilized above).

A

275°-865°C

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2
Q

Stabilized engine ITT above _____ at IDLE power could indicate a failing outer transition liner; ABORT.

A

675°C

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3
Q

Maximum acceptable engine ITT during engine starting or acceleration is _____ ITT for _____.

A

900°C; 12 seconds

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4
Q

ENG HOT light will illuminate at _____ ITT.

A

880°C

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5
Q

Continuous engine core RPM operating range is _____.

A

56%-100%

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6
Q

Allowable core RPM range is _____ RPM for 3 seconds (yellow band).

A

100%-102%

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7
Q

Engine core RPM must not exceed _____ RPM (red line).

A

102%

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8
Q

Normal oil pressure range, core RPM IDLE to MAX, is _____ PSI.

A

55-95

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9
Q

Acceptable oil pressure range, core RPM IDLE to 85%, is _____ PSI.

A

40-55

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10
Q

Engine may operate at IDLE for emergency use only if oil pressure falls to the range of _____ PSI (red band).

A

30-40

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11
Q

Do not operate an engine if oil pressure falls below _____ PSI.

A

30

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12
Q

ENG OIL PRESS light will illuminate at _____ PSI and below.

A

34-39

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13
Q

Max oil pressure when air temperature is -30°C or below is _____ PSI.

A

100

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14
Q

Oil pressure fluctuation limits are _____ PSI within steady state range.

A

+/- 5

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15
Q

Allowable intermittent oil pressure fluctuation limits are _____ PSI for a maximum of _____.

A

+/- 10; 2 seconds

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16
Q

During zero-G or negative-G flight, oil pressure may fall to _____ PSI.

A

0

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17
Q

Normal engine fan speed operating range is _____ RPM.

A

22%-98%

18
Q

Engine fan speed range of _____ RPM (steady state) indicates an engine malfunction.

A

98%-100%

19
Q

Normal engine fuel flow range is _____ pounds per hour (PPH).

A

150-4100

20
Q

During an engine start, light off must occur within _____ of fuel flow.

A

20 seconds

21
Q

If an engine fails to light off, move the throttle to OFF, dry motor for _____ and wait _____ before attempting another start.

A

30 seconds; 1 minute

22
Q

During engine start, its hydraulic system pressurizes at _____ RPM.

A

37%-47%

23
Q

During engine start, its AC generator comes online at _____ RPM.

A

52%

24
Q

During engine start, the ENG START CYCLE light should go out and the APU should unload _____ after the core RPM passes _____.

A

10 seconds; 56%

25
Q

Failure of the ENG START CYCLE light to go off within _____ after core RPM passes _____ may damage the ATS.

A

30 seconds; 56%

26
Q

During a start, the engine should accelerate to minimum IDLE core RPM within _____ of ITT rise (light off).

A

60 seconds

27
Q

ATS can make consecutive engine starts with _____ between cycles.

A

60 seconds

28
Q

ATS is limited to _____ for motoring an engine, followed by a rest period of _____.

A

2 minutes; 5 minutes

29
Q

Moving the engine operate switch to IGN provides _____ of ignition regardless of throttle position or core RPM.

A

30 seconds

30
Q

Engines take approximately _____ to accelerate from IDLE to MAX.

A

10 seconds

31
Q

The high-bypass turbofan produces _____ of the engine’s total thrust.

A

85%

32
Q

During takeoff roll, write up engine performance on 781s if fan speed is _____ below predicted takeoff fan speed.

A

2%

33
Q

During takeoff roll, abort the takeoff if engine fan speed is _____ below predicted takeoff fan speed.

A

3%

34
Q

An assisted engine air start requires up to _____ from initiation of the APU start to usable engine thrust.

A

110 seconds

35
Q

During a crossbleed engine start (while airborne), the bleed-air demand results in a _____ loss of thrust.

A

4%

36
Q

During a crossbleed Engine start, operating engine must be at least _____ RPM to supply sufficient bleed air.

A

85%

37
Q

For assisting air starts, motor to cool the engine below _____ (altitude permitting); when above 15,000’ MSL, motor the engine below _____.

A

150°C; 100°C

38
Q

Prior to shutdown, operate engines at IDLE (</= 80%) RPM for _____.

A

5 minutes

39
Q

During engine shutdown, hold throttle against aft stop until fuel has drained, or until core RPM is below _____ and ITT falls below _____.

A

5%; 200°C

40
Q

Motor engine at _____ until engine is below _____ ITT (Local Standard).

A

20%; 100°C