Limits (Ch. 4)

Question 1

Turbine Gas Temperature

TGT

IRP DECUs

Answer 1

• 0-810°C Continuous
• 810-851 30 minutes
• 851-903 2.5 minutes
• 903-949 12 seconds
• 949 maximum

Question 2

TGT

MRP EDECUs

Answer 2

• 0-810°C Continuous
• 810-851 30 min
• 851-878 10 min
• 878-903 2.5 min
• 903-949 12 sec
• 949 max

Question 3

Np

Power Turbine Speed

Answer 3

• <96% Avoid
• 96-105 Continuous
• 105-120% 12 seconds
• 120% Maximum

Question 4

Nr

Main Rotor Speed

Answer 4

• <96% Avoid
• 96-101 Continuous
• 101-120 Precautionary
• 120% Max
• >120% 123%, Maximum for FCF only
• 127, 137, &142 Overspeed Latch

Question 5

Dual Engine Torque

<80 KIAS

Answer 5

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

Question 6

Dual Engine Torque

>80 KIAS

Answer 6

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

Dual Engine Torque Limits apply when both engines are above 65% torque.

Question 7

Single Engine Torque

Answer 7

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

Question 8

Ng

Gas Generator Speed

Answer 8

• 0-98% Continuous
• 98-102.2 Continuous
• 102.2-105.1 12 Seconds
• 105.1% Maximum

Question 9

XMSN T

Answer 9

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

Question 10

XMSN Pressure

Answer 10

• 20psi minimum
• 20-30 idle and transient
• 30-65 continuous (45 to 60 in level flight)
• 65-130 precautionary
• 130 Maximum

Question 11

ENG Oil Temp

Answer 11

• -50 to 135°C Continuous
• 135-150 30 min
• 150 Maximum

Question 12

ENG Oil Pressure

Answer 12

• 22psi Minumum
• 22-26 Precautionary
• 26-100 Continuous
• 100-120 Precautionary
• 120 psi Maximum

*Normal Idle range is 22 to 55 psi.

Question 13

Engine Starter Limitations

Answer 13

• <16°C
  
  • first cycle —————60 seconds
  • seconds cycle———60 seconds
  • third cycle—————60 seconds
  • fourth cycle————-30 minutes
• 16 to 52 °C
  
  • first cycle—————-60 seconds
  • second cycle———-30 minutes
• engine motor (ignition off)
  
  • 2 minutes engaged——-5 min disengaged
  • 2 minutes engaged——30 min disengaged

Question 14

Minimum Planned Fuel on Deck

Answer 14

• Shall be no less than 600 lbs

Question 15

APU limitations

Answer 15

• SHALL be limited to essential operations only.
• acceptable uses in flight includes:
  
  • emergency procedures
  • single-engine training
  • practice autorotations
  • powering ECS during extreme temp ops

Question 16

Transmission Limitations

Answer 16

• limited by Nr, torque, oil P, oil T (whichever is reached first
• prolonged hovering in hot wx (95°F) and high gross weight may cause temps to rise in yellow range. ops in this range for less than 30 minutes during any one flight is acceptable.
• oil limits:
  
  • level flt = 45-60 psi.
    
    • steady pressure outside 45-60 but within normal limits f 30-65
    • fluctuations not to exceed a range of 10psi, within normal limits of 30 to 65.
    • during transient pitch or nose high attitudes xmsn oil pressure fluctuations (including momentary below 30psi and transient drops below 20psi for up to 1 sec) are acceptable. operating with pressure fluctuations below 30psi SHALL be limited to 30 min.

Question 17

V_ne

Answer 17

180 KIAS

Question 18

Sideward/rearward flight

Answer 18

35 knots

Question 19

Autorotation

Answer 19

100 KIAS

Question 20

Boost Off

Answer 20

140 KIAS

Question 21

Two SAS inop in IMC

Answer 21

125 KIAS

Question 22

Either PRI SERVO PRESS caution

Answer 22

125 KIAS

Question 23

Searchlight in fixed position other than stowed?

Searchlight in transition?

Answer 23

160 KIAS

100 KIAS

Question 24

Dome at trail?

Dome below trail?

Answer 24

70 KIAS, 45° AOB

70 KIAS, 15° AOB

Question 25

cabin door opening/closing

Answer 25

60 KIAS

Question 26

Hovering turn rate?

Towing Transducer?

Answer 26

30° per second

8KGS folded, 4KGS unfolded

Question 27

Angle of Bank (AOB) Limits

Answer 27

• Normal ops - 45°
• operations above 10,000ft DA - 30°
• Either PRI SERVO PRESS caution ON - 30°
• Boost off flight - 30°

Question 28

Prohibited Maneuvers

Answer 28

• Aerobatic flight
• Practice full autorotations
• Intentional approaches into or inducement of retreating blade stall

Question 29

Rotor Brake Operating Limitations

Answer 29

• Max rotor speed for applications is 76% Nr
• routine stops shall be made between 30 and 50% Nr
• Stops limited to 180 psi

Question 30

Blade, Pylon, and Stab fold and spread limits

Answer 30

• max wind velocy for fold or spread is 45 kts from any direction
• following a complete fold and spread cycle, allow a 10min cooling period before commencing another fold or spread.
• complete blade fold and spread cycle is defined as a full spread evolution followed immediately by a full fold.

Question 31

Landing Limitations

Rate of Descent

Answer 31

• level terrain shall not exceed 720 fpm for gross weight less than 19,500 lbs, and 480 for gross weight above 19,500 lbs
• for sloped terrain shall not exceed 360 fpm.

Question 32

max touchdown speed

Answer 32

• 75 KGS with tailwheel locked
• 20 KGS with tailwheel unlocked

Question 33

max ground taxi speed

Answer 33

• 40 KGS with tail gear shimmy damper
• 20 KGS without damper

Question 34

Slope Landing Limits

Answer 34

• 6° nose-down slope
• 9° nose-up slope
• 12° cross-slope

Question 35

Aircraft Operating Gross Weight Limits

Answer 35

• max gross weight is 23,500 lbs
• aviation ship 23,500 lbs
• air capable ship 22,500 lbs

Question 36

Minimum Aircraft Equipment for Night Flight Over Water

Answer 36

• LAWS
• Altitude hold (RADALT or BARALT)

Question 37

Operating Temperature Limits

Answer 37

• -40° C to 60° C
• (-40° F to 140° F)

Question 38

APU Operating Limitations

Answer 38

• 43° C and above with engine and rotor operating limited to 30 minutes
• engine and rotor not operating, the APU may be operated continuously up to an ambient temp of 51° C

Question 39

Backup Hyd Pump Limits

Answer 39

• min operating——Min Cooling
• 33 to 38° C—-24min————72min
• 39 to 60° C—16 min————48 min