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MH-60R > Limits > Flashcards

Limits Flashcards

1
Q

Starter Cycle and time between cycles

A

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

60 second delay between attempts. Except during emergencies.

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2
Q

Turbine Gas Temperature (TGT)

Continuous
30 Minutes
10 Minutes
2.5 Minutes
12 Seconds
Maximum
A 
0-810°C
810-851°C
851-878°C
878-903°C
903°-949°C
949°C
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3
Q

Power Turbine Speed (Np)

1 x C

A 
<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.

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4
Q

Gas Generator Speed (Ng)

A

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

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5
Q

Engine Oil Temperature

A

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

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6
Q

Engine Oil Pressure

1 x N

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

Note: Normal idle range is 22-55psi

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7
Q

Starter Limitations

A

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

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

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8
Q

Engine Motor (ignition off)

1 x N

A

Starter engaged/Disengaged
2 minutes / 5 minutes

2 minutes / 30 minutes

Note: times for motoring are cumulative

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9
Q

Engine operations with gust lock engaged

A

is prohibited.

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10
Q

APU Operating Limits

A

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

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

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11
Q

Backup Hydraulic Pump

A

With rotor system static:

OAT / Operating time / Cool down time

33-38°C / 24 minutes / 72 minutes

39-60°C / 16 minutes / 48 minutes

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12
Q

Dual Engine Torque <80KIAS

1 x N

A

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

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

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13
Q

Dual Engine Torque >80KIAS

1 x N

A

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

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

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14
Q

Single Engine Torque

A

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

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15
Q

Transmission Temperature

A

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

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16
Q

Transmission Pressure

A 
20psi Minimum
20-30psi Idle and Transient
30-65psi Continuous
45-60psi Level flight
65-130psi Precautionary
130psi Maximum
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17
Q

Indications of Degraded Transmission Lubricated System

A
  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
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18
Q

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

A

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.

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19
Q

Rotor engagement/disengagement wind limits

A

45kts any direction

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20
Q

Main Rotor Speed (Nr)

A 
<96% Avoid
96-101% Continuous 
101-120% Precautionary
120% Maximum
>120% FCF only up to 123%
127% Overspeed latch
21
Q

Rotor Brake Operations

A

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

22
Q

Blade, Pylon, and Stabilator Fold and Spread

A

45kts wind any direction

Allow 10 minutes cooling period between evolutions

23
Q

Maximum A/S

A

180KIAS

24
Q

Sideward/rearward flight A/S

A

35KIAS

25
Q

Autorotation A/S

A

100KIAS

26
Q

Boost Off A/S

A

140KIAS

27
Q

SAS1 and SAS2 Inoperative in IMC A/S

A

125KIAS

28
Q

Either PRI SERVO PRESS caution A/S

A

125KIAS

29
Q

Searchlight fixed in position other than stowed A/S

A

160KIAS

30
Q

Searchlight in transition A/S

A

100KIAS

31
Q

Dome at or above trail A/S

cable extended 10ft, dome ~6ft below aircraft

A

70KIAS and 45°AOB

32
Q

Dome below trail A/S

A

70KIAS and 15°AOB

33
Q

Cabin door opening/closing A/S

A

60KIAS

34
Q

MTS installed, <90KIAS, descent >1000fpm

A

Results in inaccurate and erratic airspeed indications

35
Q

Rate of descent with rescue hoist loads

A

1000fpm

36
Q

AOB Limitations

A

45° Normal operations

30° Operations >10,000ft DA, either PRI SERVO PRESS caution, and Boost Off flight

37
Q

Hovering Limitations

A
  1. Prolonged rearward flight and downwind hovering should be avoided to prevent accumulation of exhaust fumes in the helicopter and what damage to the window on an open cabin door
  2. Hovering turns in excess of 30°/second
  3. Dipping sonar operations at altitudes other than 70ft (dipping at altitudes other than this may result in electrostatic discharge)
  4. Do not tow transducer in water >8KGS folded / 4KGS unfolded
38
Q

Maximum rate of descent level terrain

A

720fpm with gross weight <19,500lbs

480fpm with gross weight >19,500lbs

39
Q

Maximum rate of decent sloped terrain

A

360fpm

40
Q

Maximum touchdown speed

A

75KGS with tailwheel locked

20KGS with tailwheel unlocked

41
Q

Maximum taxi speed

A

40KGS

20KGS if shimmy damper not installed or inoperative

42
Q

Slope landings

A

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

43
Q

Prohibited maneuvers

A
  1. Aerobatic flight
  2. Practice full autorotations
  3. Intentional approaches into or inducement of retreating blade stall
44
Q

Minimum equipment for night flight over water

A
  1. LAWS

2. Altitude hold (RADALT or BARALT)

45
Q

Helicopters equipped with de ice equipment

A

Permitted flight into forecast or known trace or light icing conditions

46
Q

Helicopters not equipped with deice equipment

A

Prohibited from flying into forecast or known icing conditions (ambient temperatures of 5°C or below in visible moisture)

47
Q

Minimum equipment for passengers

A

Helicopter emergency egress lighting system (ADHEELS and IHEELS) shall be operational for all over water flights requiring passengers/non-aircrew in the cabin

48
Q

Temperature limitations

A

Operations at temperatures below - 40°C (-40°F) or above 60°C (140°C) are prohibited

MH-60R (2 decks)

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