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F100 Limitations > Powerplant and APU Limitations > Flashcards

Powerplant and APU Limitations Flashcards

1
Q

What is the maximum TGT for Engine Start ?

A

740 deg C (max 2 sec)

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2
Q

What is the maximum TGT during engine relights ?

A

780 deg C (max 2 sec)

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3
Q

What is the maximum engine limitations for takeoff ?

N1
N2
TGT

A

N1 - 95.5%
N2 - 103.5%
850 deg C (5 min)
Time Limit = 5 mins (2 Engine)
10 Mins (1 Engine)

(in case of engine failure after take off may be extended to 10 min)

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4
Q

What is the maximum engine continuous operating limits ?

N1
N2
TGT

A

N1 - 95.5%
N2 - 100.5%
TGT - 795 deg C
Time Limit = Unrestricted

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5
Q

What is the maximum engine overspeed limits ?

N1
N2

A

N1. - 98.3%
N2. - 106.6%

(Both max 20 seconds)

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6
Q

What is considered the minimum engine N2 idle speed to consider an engine stabilised ?

A

N2. - 47.9%

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7
Q

What is the maximum engine limitations for reverse thrust ?

N1
N2
TGT

A

N1. - 95.5%
N2. - 99.2%
850 deg C
Time Limit = 60 seconds

ADDITIONAL - To avoid high fan blade stresses, stabilized operation in the restricted range

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8
Q

What is the engine N1 restricted range ?

A

57 - 75 % N1

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9
Q

What is the engine minimum oil pressure for takeoff ?

A

30 psi

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10
Q

What is the minimum engine oil pressure in flight ?

A

Is variable -

Low idle - 16 psi

78 % N2 - 25 psi

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11
Q

What is the minimum engine oil temp for engine starting ?

A

Minus 50 deg C

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12
Q

What is the engine minimum oil temp before increasing power following engine start ?

A

Minus 30 deg C

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13
Q

What is the engine maximum oil temp (Unrestricted) ?

A

105 deg C

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14
Q

What is the engine maximum transient oil temperature ?

A

120 deg C

(15 minute max)

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15
Q

Flex thrust take off shall not be used when the any of the following conditions are present (9 items) :

A
  1. Icing conditions exist
  2. Contaminated runway
  3. Wind shear or inversion
  4. Lift dumpers inop
  5. Anti skid inop (any)
  6. Wing anti ice on
  7. Tail anti ice on
  8. No means established to periodically verify rated thrust
  9. Items affecting performance cause significant increase in crew workload.
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16
Q

What is the maximum APU load at the following altitudes ?

Sea level
15000 ft
25000 ft
35000ft

A

Sea level - 100 %

15000 ft - 100%

25000 ft - 65 %

35000 ft - 30 %

17
Q

What is the engine maximum fuel temperature (unrestricted) ?

A

95 deg C

18
Q

What is the engine maximum fuel temperature (limited to 15 minutes) ?

(transient)

A

130 deg C

19
Q

What is the limitation on APU start cycles ?

A

3 consecutive starts with 2 min between starts

20
Q

What is the time limit before shutting down the APU ?

A

Allow 70 seconds before switching off the batteries, unless external AC power is available

21
Q

What is considered the required bleed pressure to start engines ?

  1. APU
  2. Cross Bleed
  3. External Air
A
  1. APU- 25 PSI to 35 PSI (can be as low as 20 PSI up to 8000ft)
  2. Cross Bleed- 30 PSI
  3. External Air - 30 PSI to 50 PSI
22
Q

What is the engine warm up time required based on start oil temperature ?

A

Oil temp 40 or above - 2 mins
Oil temp 20 - 40 - 3 mins
Oil temp 20 & below - 4 mins

23
Q

What is the time required at idle thrust before engine shutdown ?

A

1 min (Engine oil returns after 15 mins)

24
Q

What should be considered the maximum oil consumption per hour ?

A

1.5 L / HR

25
Q

What is the maximum IAS below 10,000 ft in the event of a window heat failure ?

A

300 KIAS below 10000 FT

26
Q

What is the maximum altitude start for the APU (Both R and RR) ?

A

R Type = FL310
RR Type = FL350

(For an R Type APU if it is cold soaked start is not guaranteed above FL

27
Q

What is the maximum over temperature limitation ?

A

870 ºC for 20 seconds

28
Q

What are the limitations on the engine starter ?

A

4 attempts, 2 mins max, 30 seconds off
15 mins off after 4th attempt

(Must light up within 20 seconds of fuel lever open)

29
Q

What is considered the minimum oil pressure to complete a flight ?

A

16 - 25 psi

F100 Limitations (14 decks)

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