TH-57 Limits (SEP '19)

Question 1

Nf RPM - Power On

Answer 1

97-100%

Question 2

Nf RPM - Avoid Range (Steady State Ops)

Answer 2

71-88%

Question 3

Nr RPM - Power On

Answer 3

97-100%

Question 4

Nr RPM - Power Off

Answer 4

90-107%

Question 5

Ng RPM - Idle

Answer 5

62 +/- 2%

Question 6

Ng RPM - Normal

Answer 6

60-105%

Question 7

Ng RPM - Transient

Answer 7

Max 106% for 15 seconds

Question 8

Engine Oil Pressure - Below 79%

Answer 8

min 50 psi

Question 9

Engine Oil Pressure - 79-94%

Answer 9

min 90 psi

Question 10

Engine Oil Pressure - Greater Than 94%

Answer 10

min 115 psi

Question 11

Engine Oil Pressure - Max

Answer 11

130 psi

Question 12

Engine Oil Pressure - Max (Cold Wx Start)

Answer 12

max 150 psi

Question 13

Engine Oil Temperature

Answer 13

0-107 degrees C

Question 14

Transmission Oil Pressure - Continuous

Answer 14

30-50 psi

Question 15

Transmission Oil Pressure - Minimum

Answer 15

30 psi

Question 16

Transmission Oil Pressure - Max

Answer 16

70 psi

Question 17

Transmission Oil Temperature

Answer 17

15-110 degrees C

Question 18

Max Gross Weight - Internal

Answer 18

3,200 lbs

Question 19

Max Gross Weight - External

Answer 19

3,350 lbs

Question 20

Turbine Outlet Temp (TOT) - Start, Up to 810 deg C

Answer 20

No time limit

Question 21

TOT - Start, 810-927 deg C

Answer 21

10 sec max

Question 22

TOT - Start Max

Answer 22

927 degrees C

Question 23

TOT - Transient, Up to 738 deg C

Answer 23

No time limit

Question 24

TOT - Transient, 738-810 deg C

Answer 24

5 min

Question 25

TOT - Transient, 810-843 deg C

Answer 25

6 sec

Question 26

TOT - Transient Max

Answer 26

843 degrees C

Question 27

Max Continuous Torque

Answer 27

85%

Question 28

Military Power Limit Torque

Answer 28

100% for 5 min

Question 29

Transient Torque

Answer 29

100-110% for 5 sec

Question 30

Vne - FCS Off

Answer 30

130 KIAS

Question 31

Vne - FCS On

Answer 31

122 KIAS

Question 32

Max Rate of Climb Airspeed

Answer 32

50 KIAS

Question 33

Max Airspeed with Any Doors Off

Answer 33

110 KIAS

Question 34

Max Autorotational Airspeed

Answer 34

100 KIAS

Question 35

Turbulence Penetration Airspeed

Answer 35

80 KIAS

Question 36

IMC Climb/Descent Rate

Answer 36

100'/min

Question 37

Minimum IFR Airspeed (Vmini)

Answer 37

65 KIAS

Question 38

Max Operating Altitude (FCS Off) At or Less Than 3000 lbs Max Gross Weight

Answer 38

P.A. - 20,000' D.A. - 18,000'

Question 39

Max Operating Altitude (FCS Off) Above 3000 lbs Max Gross Weight

Answer 39

P.A. - 16,000' D.A. - 13,000'

Question 40

Max Operating Altitude (FCS On/IFR) Above 3000 lbs Max Gross Weight

Answer 40

P.A. - 8,500' D.A. - 11,000'

Question 41

Max Operating Altitude (FCS On/IFR) At or Less Than 3000 lbs Max Gross Weight

Answer 41

P.A. - 11,500' D.A. - 13,500'

Question 42

Max Sideward and Rearward Flight: 0-1000' Density Altitude (DA)

Answer 42

Side - 25 knots Rear - 15 knots

Question 43

Max Sideward and Rearward Flight: 1000-2000' DA

Answer 43

Side - 20 knots Rear - 15 knots

Question 44

Max Sideward and Rearward Flight: 2000-4000' DA

Answer 44

Side - 15 knots Rear - 15 knots

Question 45

Max Sideward and Rearward Flight: 4000-6000' DA

Answer 45

Side - 10 knots Rear - 10 knots

Question 46

Max Sideward and Rearward Flight: 6000-10,000' DA

Answer 46

Side - 5 knots Rear - 5 knots

Question 47

Starter Limits (Battery Power)

Answer 47

40 secs - ON 60 secs - OFF 40 secs - ON 60 secs - OFF 40 secs - ON 30 minutes - OFF Note: If light off occurs within first 20 secs of sequence the starter may be operated for 60 secs ON then 60 secs OFF. 3 such attempts can occur within 30 minutes then 30 minutes OFF.

Question 48

Starter Limits (External Power)

Answer 48

25 secs - ON 30 secs - OFF 25 secs - ON 30 secs - OFF 25 secs - ON 30 minutes - OFF Note: If light off occurs within first 20 secs of sequence the starter may be operated for 60 secs ON then 60 secs OFF. 3 such attempts can occur within 30 minutes then 30 minutes OFF.