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UH-60M > Chapter 5 > Flashcards

Chapter 5 Flashcards

1
Q

What are the NP1/NP2 limitations?

A

Transient: 91-95%
Continuous: 95-101%
Transient: 101-105%
12 Second Transient: 105-107%

*Avoid operations in the 20-40% and 60-90% except during startup and shutdown

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2
Q

What are the NR limitations?

A

POWER ON:
Transient: 91-95%
Continuous: 95-101%
Transient: 101-107%

POWER OFF:
Normal: 90-105%
Transient: 105-110%
Maximum: 110%

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3
Q

What are the NG limitations?

A

Continuous: 0-105%
12 Second Transient: 105-106%

On the PFD, digital read out will appear at 100%

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4
Q

What are the Q limitations?

A

CONTINUOUS:
Dual Engine @ or below 80kts: 0-120%
Dual Engine above 80 kts: 0-100%
Single Engine: 0-135%

10 SECOND TRANSIENT:
Dual Engine @ or below 80kts: 120-144%
Dual Engine above 80 kts: 100-140%
Single Engine: 135-144%

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5
Q

What are the TGT limitations?

A

Continuous: 0-793C
30 Minute Limit: 793-846C
10 Minute Limit: 846-879C
Start Abort Limit: 851C
2.5 Minute Limit: 879-903C
12 Second Transient: 903-949C

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6
Q

What are the engine oil temperature limits?

A

Continuous: -20-135C
30 Minute Limit: 135-150C

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7
Q

What are the engine oil pressure limits?

A

Idle: 22-26PSI
Continuous: 26-100PSI
5 Minute Limit: 100-120PSI

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8
Q

What are the transmission oil temperature limits?

A

Continuous: -20-105C
Precautionary: 105-140C

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9
Q

What are the transmission oil pressure limits?

A

Idle and transient: 20-30PSI
Continuous: 30-65PSI
Precautionary: 65-130PSI

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10
Q

What are the PFD power pod indications?

A

Normal: >200 in each tank
Precautionary: 0-200 in each tank

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11
Q

What are the engine starter limits?

A

15C (59F) and below: two consecutive start cycles, followed by a 3-minute rest period, followed by two additional consecutive start cycles. 30-minute rest is required before anymore starts.

> 15-52C(59-126F): Two consecutive start cycles can be made. 30-minute rest period is required before any additional cycles.

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12
Q

What are the engine start limits?

A

Crossbleed start shall not be attempted unless the ENG 1 ANTI ICE ON or ENG 2 ANTI ICE ON advisory does not appear, operating engine must be at 90% NG or above and NR must be at 100%

When attempting single engine starts at pressure altitudes above 14,000’, press the start switch with the ENG POWER CONT lever OFF, until maximum motoring speed (24%) is reached before advancing to IDLE

CAUTION: Engine start attempts at or above pressure altitude of 18000’ could result in hot start

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13
Q

What are the engine overspeed check limits?

A

Overspeed check in flight is prohibited. Checks on the ground are authorized by designated maintenance personnel only

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14
Q

What are the fuel limits?

A

Fuel boost pumps shall be on when operating with JP-4:
A) At 5000’ PA and above
B) When operating in crossfeed at any time with JP-4

When a helicopter operating with JP4 is restarted within 2 hours of engine shutdown and air temp is above 21C(70F) a minimum of 2 minutes dual engine at 100% NR is required to purge any hot fuel

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15
Q

What are the weight limitations?

A

UH60M: 22,000lbs
UH-60M w/ external lift: 23,500lbs
UH60M ESSS/ERFS: 24,500lbs

External lift missions above 22,000lbs can be flown with a cargo hook load above 8000lbs and up to 9000lbs

Cargo floor: 300lbs/square foot

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16
Q

Stowage provision limits?

A

125lbs per compartment

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17
Q

Cabin ceiling tie down limits?

A

4 cabin tie down fittings: 4000lbs
17 tiedowns on floor: 5000lbs
8 net restraint rings: 3500lbs

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18
Q

Cargo hook weight limits?

A

9000lbs

19
Q

Cargo hook airspeed limits?

A

Cargo hooks up to 8000lbs: 140 KIAS
Greater than 8000lbs and greater than 22000lbs shall not exceed 120 KIAS

20
Q

Single engine airspeed limits?

A

130KIAS

21
Q

Airspeed limits for autorotations?

A

Gross weight of 16,825lbs or less: 150KIAS
Gross weight of 16,825 or more: 130 KIAS

22
Q

Sideward/reward airspeed limits?

A

Hovering in winds greater than 45 kts from the sides or rear is prohibited.

Sideward/rearward flight into wind shall not exceed 45 kts

23
Q

SAS inop airspeed limits?

A

One SAS inop: 170 KIAS
Two SAS inop: 150 KIAS
Two SAS inop in IMC: 140 KIAS

24
Q

Hyrdaulic system inop airspeed limits?

A

One system inop: 170 KIAS
Two systems inop: 150 KIAS
Two systems inop in IMC: 140 kias

25
Q

Landing light airspeed limits?

A

Extended prior to 130 KIAS
Max airspeed limited to 180 KIAS

26
Q

Searchlight airspeed limits?

A

Extended prior to 100 KIAS
Max airspeed limited to 180 KIAS

27
Q

Maximum airspeed for autorotation with volcano?

A

100 KIAS

28
Q

Maximum airspeed for skis installed?`

A

155 KIAS

29
Q

Airspeed limits with cabin doors/windows open?

A

Cabin doors may be fully open up to 145KIAS

Doors will not be intentionally opened in flight unless required by the mission. Should doors need to be opened, airspeed must be at 80 KIAS or less

Gunners windows may be fully open up to 170 KIAS

30
Q

Limits following failure of automatic stabilator control system?

A

NOTE: Autorotations may not exceed 120 KIAS

Manual control available:
1) Stabilator shall be full down at speeds below 40 KIAS
2) Stabilator shall be set at 0* at speeds above 40 KIAS

Manual control not available:
Remain outside of the red Vne arc

31
Q

What are the prohibited maneuvers?

A

Hovering turns greater than 30*/sec

Intentional maneuvers of +- 30 * in pitch or +-60* in roll

Moving both ENG CONT levers to IDLE or OFF in flight

Reward ground taxi

32
Q

Blade stall

A

Blade stall is based on airspeed, gross weight, pressure altitude and temperature.

When operating near blade stall, any increase in airspeed, bank angle, turbulence or abrupt flight control inputs will result in increased severity of stall.

Fully developed stall will be accompanied by heavy four-per-rev vibration, increased torque, and loss of altitude

Recovery id accomplished by reducing severity of the maneuver through collective, airspeed, or bank angle reduction

33
Q

High speed yaw limitations?

A

Above 80KIAS, avoid abrupt, full pedal inputs to prevent excessive loading of tail rotor system

34
Q

Maneuvering limits with slings?

A

Maximum of 30* angle of bank in forward flight. Reward flight with slings limited to 35 knots

35
Q

Bank angle with PRI SERVO FAIL caution?

A

30*

36
Q

High acceleration takeoff, hover, and dive limits?

A

If approaching 30* nose down during any high acceleration take off, normal stabilator position can lag FCC desired position and the FCC will command an AUTO MODE FAILURE

37
Q

Landing gear limitations?

A

Gross weights up to 16,825lbs:
-540 fpm on level terrain
-360 fpm on sloping terrain

Gross weights over 16,825lbs:
-300 fpm on level terrain
-180 fpm on sloping terrain

38
Q

Landing speed limitations?

A

60 knots GS

39
Q

Slope landing limitations?

A

15* nose up, right wheel or left wheel up. Reduce by 2* for every 5 kts of wing

6* nose downslope. Nose down slopes will tail winds greater than 15 kts shall be prohibited

Main rotor gearbox may be operated up to 30 min at a time with pressure fluctuations when nose up

NOTE: the flat profile of the main transmission and forward location of both transmission oil pumps, transmission oil pressure will drop during nose up operations. At a slope angle of 10, indicated pressure of 30-35PSI is normal; at slope angle of 15, 10-15PSI is normal

40
Q

Flight into Icing conditions

A

When ambient air tempt is 4C (39F) or below and visible liquid moisture is present, icing may occur

To fly into trace or light icing, need the following installed and operational:
-Windshield anti-ice
-Pitot heat
-Engine anti-ice
-Engine inlet anti ice modulating valve
-Insulating ambient air sensing tube

To fly into moderate icing, need the previous 5 things installed AND blade deice

41
Q

Engine and engine inlet anti-ice limits?

A

At engine power levels of 10% Q per engine and below, full anti-ice capability cannot be provided due to engine bleed limits. Avoid operations under conditions of extreme low power requirements and a high rate pf descent (1900fpm) or ground bleed air HEATER operation below 100% NR during icing conditions. Cabin heater should be turned off before high rate of descent

42
Q

Back up hydraulic pump limits?

A

FAT: -54-32C operating time is unlimited with no cooldown time

FAT: 33-38C operating time is 24 minutes with a 72 minute cooldown

FAT 39-52C operating time is 16 minutes with 48 minute cooldown

43
Q

APU operating limits?

A

43C and above, with engine and rotor operating, limited to 30 minutes

With engine and rotors not operating, APU may be continuously operating up to 51C

If APU OIL HOT caution appears, a 30 minute cooling period is required before checking oil level

44
Q

Windshield anti ice limits?

A

Anti ice check shall not be done when FAT is over 27C

UH-60M (7 decks)

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