Powerplant and APU Limitations

Question 1

Max TGT Engine Start

Answer 1

F100 - 740 deg C (max 2 sec)

F70 - 700 deg C (max 2 sec)

Question 2

Max TGT during Relights

Answer 2

F100 and F70 - 780 deg C (max 2 sec)

Question 3

Max Takeoff operating limits

N1
N2
TGT

Answer 3

N1 - 95.5%
N2 - 103.5%
TGT - F100 850 deg C (5 min)
- F70 - 800 deg C (5min)

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

Question 4

Max Continuous operating limits

N1
N2
TGT

Answer 4

N1 - 95.5%
N2 - 100.5%
TGT - 795 deg C / F70 - 735 deg C

(All unrestricted)

Question 5

Max Overspeed limits

N1
N2

Answer 5

N1. - 98.3%
N2. - 106.6%

(Both max 20 seconds)

Question 6

Max Over temp limit

Answer 6

F100 870 deg C

F 70 820 deg C

(max 20 sec)

Question 7

Minimum Low Idle

N2

Answer 7

N2. - 47.9%

Question 8

Max Reverse Thrust

N1
N2
TGT

Answer 8

N1. - 95.5%
N2. - 99.2%
TGT - F100 850 deg C
F 70 800 deg C

(Max 60 seconds)

Question 9

N1 restricted range

Answer 9

Avoid stabilised operation in the range 60 - 72 % N1 with a static aircraft and wind in excess of 15 kt.

Question 10

N1 restricted range - reverse

Answer 10

57 - 75 % N1

Question 11

Minimum oil pressure - takeoff

Answer 11

30 psi

Question 12

Min oil pressure in flight

Answer 12

Variable

Low idle - 16 psi

78 % N2 - 25 psi

Question 13

Min oil temp starting

Answer 13

Minus 50 deg C

Question 14

Min oil temp before increasing power

Answer 14

Minus 30 deg C

Question 15

Maximum oil temp

(Unrestricted)

Answer 15

105 deg C

Question 16

Maximum transient oil temperature

Answer 16

120 deg C

(15 minute max)

Question 17

Flex thrust take off shall not be used when:

(9 items)

Answer 17

1. Icing conditions exist
2. Contaminated runway
3. Wind shear or inversion
4. Lift dumpers inop.
5. Any anti skid inop.
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.

Question 18

Max APU load

Sea level
15000 ft
25000 ft
35000ft

Answer 18

Sea level - 100 %

15000 ft - 100%

25000 ft - 65 %

35000 ft - 30 %

Question 19

Engine Starting

Answer 19

Question 20

Engine Warm up

Answer 20

Question 21

Max Fuel Temp (unrestricted)

Answer 21

95 deg C,

Question 22

Max Fuel Temp (transient)

Answer 22

130 deg C. (15 minutes)