Power Plant Limitations

Question 1

N1 (gas producer rpm) – Twin engine operations —> x% to x% - Continuous operations

Answer 1

61% to 103,1% - Continuous operations

Question 2

N1 (gas producer rpm) – Twin engine operations - x% - Maximum continuous

Answer 2

103,1% - Maximum continuous

Question 3

N1 (gas producer rpm) – One engine inoperative

x% - Continuous

Answer 3

103,7% - Continuous

Question 4

N1 (gas producer rpm) – One engine inoperative

x% to x% - Two and a half minutes

Answer 4

103,7% to 109,2% - Two and a half minutes

Question 5

N1 (gas producer rpm) – One engine inoperative

x% - Maximum

Answer 5

109,2% - Maximum

Question 6

N2 (engine rpm)
xx% - Minimum in cruise at or below 6 000 feet HD

100% - Minimum for hover, takeoff, and climb
- Minimum in cruise above 6 000 feet HD
97% to 100% - Continuous operations
100% - Maximum above 30% QE
100% to 103% - Operation at or below 30% QE
103% - Maximum at or below 30% QE

Answer 6

97%

Question 7

N2 (engine rpm)

xxx% - Minimum for hover, takeoff, and climb

Answer 7

100%

Question 8

N2 (engine rpm)

Continuous operations

Answer 8

97% to 100%

Question 9

N2 (engine rpm)

Maximum above 30% QE

Answer 9

100%

Question 10

N2 (engine rpm)

Maximum above 30% QE

Answer 10

100% to 103%

Question 11

N2 (engine rpm)

Maximum at or below 30% QE

Answer 11

103%

Question 12

QE (engine torque) – One engine inoperative

Continuous operations

Answer 12

5% to 73,2%

Question 13

QE (engine torque) – One engine inoperative

Maximum continuous

Answer 13

73,2%

Question 14

QE (engine torque) – One engine inoperative

Two and a half minutes

Answer 14

73,2% to 81%

Question 15

QE (engine torque) – One engine inoperative

Maximum

Answer 15

81%

Question 16

ITT (inter-turbine temperature) – Twin engine operations

Continuous operations

Answer 16

300 °C to 810 °C

Question 17

ITT (inter-turbine temperature) – Twin engine operations

Maximum continuous

Answer 17

810 °C

Question 18

ITT (inter-turbine temperature) – Twin engine operations
Maximum transient
- Do not exceed five seconds above 810 °C

Answer 18

940 °C

Question 19

ITT (inter-turbine temperature) – Twin engine operations
Maximum for starting
- Do not exceed two seconds above 960 °C

Answer 19

1 090 °C

Question 20

ITT (interturbine temperature) – One engine inoperative – Maximum continuous

Answer 20

820 °C

Question 21

ITT (interturbine temperature) – One engine inoperative – Two and a half minutes

Answer 21

820 °C to 940 °C

Question 22

ITT (interturbine temperature) – One engine inoperative – Maximum

Answer 22

940 °C

Question 23

Engine oil pressure – Minimum for idle

Answer 23

40 psi

Question 24

Engine oil pressure – Operation below 79% N1

Answer 24

40 psi to 80 psi

Question 25

Engine oil pressure – Continuous operations

Answer 25

80 psi to 115 psi

Question 26

Engine oil pressure – Maximum

Answer 26

115 psi

Question 27

Combining gearbox oil pressure - Minimum for idle

Answer 27

40 psi

Question 28

Combining gearbox oil pressure - Operation below 94% N2
60 psi to 80 psi - Continuous operations
80 psi - Maximum

Answer 28

40 psi to 60 psi

Question 29

Combining gearbox oil pressure - Continuous operations

Answer 29

60 psi to 80 psi

Question 30

Combining gearbox oil pressure - Maximum

Answer 30

80 psi

Question 31

Engine and combining gearbox oil temperature

Minimum

Answer 31

0 °C

Question 32

Engine and combining gearbox oil temperature

Continuous operations

Answer 32

0 °C to 115 °C

Question 33

Engine and combining gearbox oil temperature

Maximum for MIL-PRF-7808 oil

Answer 33

115 °C

Question 34

Engine and combining gearbox oil temperature

Maximum for MIL-PRF-23699

Answer 34

120 °C

Question 35

• Transmission limitations -
  Transmission oil pressure

-> Minimum

Answer 35

30 psi

Question 36

• Transmission limitations -
  Transmission oil pressure

-> Minimum at Idle

Answer 36

30 psi to 40 psi

Question 37

• Transmission limitations -
  Transmission oil pressure

-> Continuous operations

Answer 37

40 psi to 70 psi

Question 38

• Transmission limitations -
  Transmission oil pressure

-> Maximum

Answer 38

70 psi

Question 39

• Transmission limitations -
  Transmission oil temperature
• Continuous operations

Answer 39

15 °C to 110 °C

Question 40

• Transmission limitations -
  Transmission oil temperature
• Maximum

Answer 40

110 °C

Question 41

QM (mast torque) – Twin engine operations

- Maximum with airspeed above 105 KIAS

Answer 41

81%

Question 42

QM (mast torque) – Twin engine operations

• Takeoff
• Maximum five minutes

Answer 42

81% to 100%

Question 43

QM (mast torque) – Twin engine operations

• Maximum with airspeed up to 105 KIAS

Answer 43

100%