IX. ENGINE LIMITATIONS

Question 1

39. What are the maximum N1 limits?

Answer 1

1. Idle minimum — 62%.
2. Takeoff— 104%.
3. Maximum continuous — 104%.
4. Transient— 104%.

Question 2

40. What are the ITT limits?

(Interstage Turbine Temperature)

Answer 2

1. Idle 750°.
2. Maximum reverse - 760°
3. Cruise climb - 785°.
4. Takeoff- 820°.
5. Maximum continuous - 820°.
6. Maximum cruise - 820°.
7. Transient (20 secs) - 850°
8. Start (5 secs) - 1000°

Question 3

41. What are the maximum Prop RPM limits?

Answer 3

1. Idle (Minimum) - 1050
2. Cruise - 1500.
3. Maximum reverse - 1650.
4. Takeoff - 1700.
5. Maximum continuous - 1700.
6. Inadvertent (20 seconds) - 1735
7. Transient (20 seconds.)- 1870

Question 4

42. What are the maximum Torque limits?

Answer 4

1. Takeoff & Maximum continuous - 100%
2. Inadvertent (7min) - 102%
3. Transient (20sec) - 156%

Question 5

43. What is the maximum torque limit below 1000 RPM?

Answer 5

Below 1000 propeller rpm,

torque is limited to 62%.

Question 6

44. What are normal oil pressure readings?

Answer 6

90 - 135 psi at gas generator speeds above 72%.

Oil pressures below 90 psi are undesirable.

Question 7

45. What procedure should be followed if oil pressure falls TO 60 PSI?

Answer 7

60 psi is PERMISSIBLE at a reduced power level not to exceed 62% torque.

ONLY UNDER EMERGENCY CONDITIONS

Question 8

46. What procedure should be followed if the oil pressure falls BELOW 60 psi?

Answer 8

below 60 psi - UNSAFE, LAND IMMEDIATELY

Question 9

47. During extremely cold temperatures, oil pressure may reach what value during start?

Answer 9

200 psi.

Question 10

48. What is the minimum oil temperature recommended for fuel heater operation?

Answer 10

55°C

Question 11

49. What are the oil temperature limits?

Answer 11

• -40°C and +110°C.
• between 99°C and 110°C are limited to a maximum of 10 minutes.

Question 12

50. How are high ITT temperatures corrected on the ground?

Answer 12

• Reducing accessory load
• Increasing N1 rpm.

Question 13

3. What engines are installed on the King Air 350?

Answer 13

Two Pratt & Whitney

PT6A-60A

turboprop engines.

Question 14

What type of engine is installed on the King Air 350

Answer 14

turboprop engines

Question 15

Who is the engine manufacturer of the King Air 350

Answer 15

Two Pratt & Whitney

Question 16

What is the model number of the King Air 350 engine

Answer 16

PT6A-60A

Question 17

5. What three lever sets control the engine?

Answer 17

the power levers, propeller levers, and condition levers

Question 18

7. Name the three positions of the condition levers.

Answer 18

1. FUEL CUTOFF,
2. LOW IDLE
3. HIGH IDLE

Question 19

8. What N1 is MINIMUM for LOW IDLE?

Answer 19

62% N1 at low idle.

Question 20

9. What N1 is MINIMUM for HIGH IDLE?

Answer 20

70% N1 at high idle.

Question 21

13. The engine operates on what principle?

Answer 21

reverse-airflow engine.

Question 22

18. The PT6A-60A has how many igniters?

Answer 22

2 igniters

but only needs 1 to start.

Question 23

17. The PT6A-60A has how many fuel nozzles?

Answer 23

14 fuel nozzles

2 sets

Question 24

25. What is the oil capacity?

Answer 24

3.5+gal

Question 25

26. What is the maximum OIL consumption?

Answer 25

1 qt. per 10 hours.

Question 26

27. What is the typical oil level when hot?

Answer 26

1 qt. low.

Question 27

28. What is the typical oil level when cold?

Answer 27

2 qt. low.

Question 28

29. When is the best time to check oil?

Answer 28

WITHIN 15 minutes. Shortly AFTER SHUTDOWN