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Flashcards in Limits Deck (48)
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1

Starter Cycle and time between cycles

Starter initiation, acceleration of output drive, and starter dropout.

60 second delay between attempts. Except during emergencies.

2

Turbine Gas Temperature (TGT)

Continuous
30 Minutes
10 Minutes
2.5 Minutes
12 Seconds
Maximum

0-810°C
810-851°C
851-878°C
878-903°C
903°-949°C
949°C

3

Power Turbine Speed (Np)

1 x C

<96% Avoid
96-105% Continuous
105-117% 20 Seconds
117-120% 12 Seconds
120% Maximum

Caution: during engagement, extended operations in the 20-40% and 60-75% ranges may cause engine damage.

4

Gas Generator Speed (Ng)

0-102.2% Continuous
>102.2-106% 2.5 Minutes
>106-107% 12 Seconds
107% Maximum

5

Engine Oil Temperature

-50°C - 135°C Continuous
135-150°C 30 Minutes
150°C Maximum

6

Engine Oil Pressure

1 x N

22psi Minimum
22-26psi Precautionary
26-100psi Continuous
100-120psi Precautionary
120psi Maximum

Note: Normal idle range is 22-55psi

7

Starter Limitations

<16°C
1st, 2nd, 3rd cycles = 60 seconds Disengaged
4th cycle = 30 minutes

16-52°C
1st cycle = 60 seconds
2nd cycle = 30 minutes

8

Engine Motor (ignition off)

1 x N

Starter engaged/Disengaged
2 minutes / 5 minutes

2 minutes / 30 minutes

Note: times for motoring are cumulative

9

Engine operations with gust lock engaged

is prohibited.

10

APU Operating Limits

engine/rotor operating and >43°C = 30minutes

Engine/rotor not operating and up to 51°C = Continuous

11

Backup Hydraulic Pump

With rotor system static:

OAT / Operating time / Cool down time

33-38°C / 24 minutes / 72 minutes

39-60°C / 16 minutes / 48 minutes

12

Dual Engine Torque <80KIAS

1 x N

0-120% Continuous
120-144% 10 seconds
144% Maximum

Note: Dual engine torque limits apply when both engines above 65%

13

Dual Engine Torque >80KIAS

1 x N

0-106% Continuous
106-127% 10seconds
127% Maximum

Note: Dual engine torque limits apply when both engines are above 65%

14

Single Engine Torque

0-135% Continuous
135-144% 10seconds
144% Maximum

15

Transmission Temperature

-50 - 105°C Continuous
105 - 120°C Precautionary
120°C Maximum

16

Transmission Pressure

20psi Minimum
20-30psi Idle and Transient
30-65psi Continuous
45-60psi Level flight
65-130psi Precautionary
130psi Maximum

17

Indications of Degraded Transmission Lubricated System

1. Steady pressure outside 45-60psi, but within the normal limits of 30-65psi

2. Fluctuations not to exceed a range of 10psi, within the normal limits of 30-65psi

18

During transient pitch or steady state nose high pitch attitudes (autos, downswing hovering, rearward flight, slope up landings, etc.)

Transmission oil pressure fluctuations (including momentary fluctuations below 30psi and transient drops below 20psi for up to one second) are acceptable. Operating with pressure fluctuations below 30psi shall be limited to 30minutes.

19

Rotor engagement/disengagement wind limits

45kts any direction

20

Main Rotor Speed (Nr)

<96% Avoid
96-101% Continuous
101-120% Precautionary
120% Maximum
>120% FCF only up to 123%
127% Overspeed latch

21

Rotor Brake Operations

76% Maximum Nr for application
30-50% Routine rotor stops
180psi limit for routine rotor stops

22

Blade, Pylon, and Stabilator Fold and Spread

45kts wind any direction

Allow 10 minutes cooling period between evolutions

23

Maximum A/S

180KIAS

24

Sideward/rearward flight A/S

35KIAS

25

Autorotation A/S

100KIAS

26

Boost Off A/S

140KIAS

27

SAS1 and SAS2 Inoperative in IMC A/S

125KIAS

28

Either PRI SERVO PRESS caution A/S

125KIAS

29

Searchlight fixed in position other than stowed A/S

160KIAS

30

Searchlight in transition A/S

100KIAS