Engine Parameters Limitations

Question 1

Engine Idle Parameters

Answer 1

20%N1
60%N2
400°C EGT
300Kg/h FF

Question 2

Maximum EGT for engine start in ground or in flight (CFM56)

Answer 2

725°C

Question 3

Maximum EGT for engine start in ground or in flight (IAE)

Answer 3

635ºC

Question 4

Maximum EGT for engine start in ground or in flight (P&W)

Answer 4

1083ºC

Question 5

TOGA/FLEX Time limit for Take Off or Go Around with all Engines Operating

Answer 5

5 minutes

Question 6

TOGA/FLEX Time Limit with One Engine Inoperative during Take-off or Go Around

Answer 6

10 minutes

Question 7

Maximum EGT for Take-off or Go Around (CFM56)

Answer 7

950°C

Question 8

Maximum EGT for Take-off or Go Around (IAE)

Answer 8

635ºC/650ºC

Question 9

Maximum EGT for Take-off or Go Around (P&W)

Answer 9

1083ºC

Question 10

Maximum EGT on thrust MCT (CFM56)

Answer 10

915°C

Question 11

Maximum EGT on thrust MCT (IAE)

Answer 11

610ºC

Question 12

Maximum EGT on thrust MCT (P&W)

Answer 12

1043ºC

Question 13

Maximum N1 value (CFM56)

Answer 13

104%

Question 14

Maximum N1 value (IAE)

Answer 14

100%

Question 15

Maximum N1 value (P&W)

Answer 15

100% in normal operation, 105% maximum permitted

Question 16

Maximum N2 Value (CFM56)

Answer 16

105%

Question 17

Maximum N2 Value (IAE)

Answer 17

100%

Question 18

Maximum N2 Value (P&W)

Answer 18

100% in normal operation, 105% maximum permitted

Question 19

How many start attempts are considered a cycle? (CFM56)

Answer 19

3 start attempts are considered a cycle

Question 20

How many start attempts are considered a cycle? (IAE)

Answer 20

1 start attempt is considered a cycle

Question 21

How many start attempts are considered a cycle? (P&W)

Answer 21

2 start attempts are considered a cycle

Question 22

How much time is required between 2 consecutive cycles? (CFM56)

Answer 22

20 seconds

Question 23

How much time is required between 2 consecutive cycles? (IAE)

Answer 23

15 seconds

Question 24

How much time is required between 2 consecutive cycles? (P&W)

Answer 24

35 seconds

Question 25

Until which speed can we use Max Reverse?

Answer 25

70kts

Question 26

Until which speed can we use reverse Idle?

Answer 26

Until stopping on the ground

Question 27

Is it allowed to go back with reversers on the ground?

Answer 27

No, it's not allowed

Question 28

Is reverse thrust allowed in flight?

Answer 28

No, it's not allowed in flight

Question 29

After 4 failed start cycles, the cooling period required is... (CFM56)

Answer 29

15 minutes

Question 30

After 3 failed start cycles, the cooling period required is... (IAE)

Answer 30

30 minutes or 4 minutes of continuous crank or 5 minutes of cumulated crank

Question 31

After 3 failed start cycles, the cooling period required is... (P&W)

Answer 31

15 minutes or 15 minutes of continuous or cumulated crank

Question 32

When must the starter not be used? (CFM56)

Answer 32

When N2 is above 20%

Question 33

When must the starter not be used? (IAE)

Answer 33

When N2 is above 10% on ground and 18% in-flight

Question 34

When must the starter not be used? (P&W)

Answer 34

When N2 is above 20%

Question 35

Maximum crosswind for engine start: (P&W and IAE)

Answer 35

35kts

Question 36

When does the engines warm-up period before take-off starts?

Answer 36

When the engine reaches it's idle parameters (When AVAIL is displayed)