Limitations

Question 1

What is VNE with 1 or more doors removed?

Answer 1

130kt IAS if 2501lb or more

120kt IAS if <2500lb

Question 2

Normal Operating RRPM range

Answer 2

487 to 492 RRPM (102-103%N2)

Question 3

Power OFF Min. And Max RRPM?

Answer 3

Power OFF
MIN. = 415 RRPM (87%N2) 4 blade T/R
MAX. = 523 RRPM (109%N2)

Question 4

Torque limits: Maximum Takeoff?

Answer 4

87.2 psi. 5 minutes only

Question 5

Torque limits: Max. Continuous

Answer 5

81.3 psi, TOT 738c or less
OR
74.3 psi, TOT >738c

Question 6

Torque limits: Transient?

Answer 6

87.3 - 93.0 psi, 15sec max @ 103% N2

93.1 - 97.6 psi, 3 sec max @ 103% N2

Question 7

TOT limits? Takeoff.

Answer 7

Max. T/O 810c (5 min)

Question 8

TOT Max. STARTING?
Aka ‘light off’

Answer 8

150c

Question 9

TOT Max. Continuous?

Answer 9

755c @74.3psi or less

> 74.3psi, 738c

Question 10

TOT Transient?

Start/shutdown?
Power changes in flight?

Answer 10

Start/Shutdown, 810c and above 10sec or less, peak 927c not more than 1 sec.

Power changes in flight = 810c - 843c for 6 sec.

Question 11

N1 Speed Limits?

(Gas Producer)

Answer 11

Max continuous 105%
Minimum 60% (ground idle)

• N1 ground idle recommended 64-65%. Can be reduced to min. of 60% to maintain N2 below 70%.

Question 12

N1 Transient limit?

(Gas producer)

Answer 12

106% for 15 sec.

Question 13

N2 speed avoid range?

(Power Turbine)

Answer 13

Operations between 71 - 88% prohibited.

Dwell time of no more than 1 second allowed.

Question 14

Max. Operating Density Altitude?

Answer 14

16,000ft

Question 15

VNE IAS?

Answer 15

156kt IAS

Question 16

What is VNE in Autorotation?

Answer 16

131kt IAS

(Barber pole on ASI)

Question 17

What is VNE when carrying <35lb fuel?

Answer 17

130kt IAS

Question 18

Starter operation time limitations

Answer 18

1 min. on 1 min. off
1 min. on 23 min. Off

Question 19

Flight is prohibited if battery temp. exceeds ___c?

Answer 19

71c

Question 20

What is max. continuous generator output?

Answer 20

85 amps

85 - 150 amps, 10 min. limit.

> 150 amps, 2min. limit post starting.

Question 21

What is VNE with door/s off?

Answer 21

130kt IAS

Question 22

Engine oil temp. limits for flight

Answer 22

0c - 107c

Question 23

Engine oil pressure limits?

Answer 23

50 - 130psi with following minimums:

115psi @ 94% N1 or above
90psi @ 79% N1
50psi @ 79% N1